Update golden files for upstream bias_pins feature

Upstream added bias pin type recognition, changing VNB/VPB pin
direction from "unknown" to "bias" in liberty output. Update 9
golden .ok files to match.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>

Author: jhkim-pii

liberty/test/liberty_cell_deep.ok

@@ -111,8 +111,8 @@ Cell sky130_fd_sc_hd__ebufn_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A input 1.73-1.88
  TE_B input 2.93-3.34
@@ -135,8 +135,8 @@ Cell sky130_fd_sc_hd__ebufn_2
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A input 1.74-1.89
  TE_B input 3.75-4.41
@@ -159,8 +159,8 @@ Cell sky130_fd_sc_hd__ebufn_4
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A input 2.37-2.60
  TE_B input 6.26-7.48
@@ -183,8 +183,8 @@ Cell sky130_fd_sc_hd__dlxtp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  D input 1.70-1.85
  GATE input 1.68-1.82
@@ -216,8 +216,8 @@ Cell sky130_fd_sc_hd__dlxtn_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  D input 1.70-1.89
  GATE_N input 1.66-1.82
@@ -249,8 +249,8 @@ Cell sky130_fd_sc_hd__sdfxtp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.69-1.86
  D input 1.62-1.78
@@ -297,8 +297,8 @@ Cell sky130_fd_sc_hd__sdfxbp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.70-1.87
  D input 1.61-1.78
@@ -350,8 +350,8 @@ Cell sky130_fd_sc_hd__dfxtp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.71-1.88
  D input 1.67-1.68
@@ -380,8 +380,8 @@ Cell sky130_fd_sc_hd__dfrtp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.71-1.87
  D input 1.95-2.01
@@ -423,8 +423,8 @@ Cell sky130_fd_sc_hd__dfstp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.69-1.86
  D input 2.23-2.49
@@ -466,8 +466,8 @@ Cell sky130_fd_sc_hd__dfbbp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 1.69-1.89
  D input 1.49-1.70
@@ -545,8 +545,8 @@ Cell sky130_fd_sc_hd__mux2_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A0 input 1.51-1.61
  A1 input 1.81-1.96
@@ -574,8 +574,8 @@ Cell sky130_fd_sc_hd__mux2i_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A0 input 2.10-2.31
  A1 input 2.15-2.36
@@ -603,8 +603,8 @@ Cell sky130_fd_sc_hd__mux4_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  A0 input 1.48-1.57
  A1 input 1.40-1.48

liberty/test/liberty_clkgate_lvlshift.ok

@@ -14,8 +14,8 @@ Cell sky130_fd_sc_hd__dlclkp_1
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 0.00-0.00
  GATE input 0.00-0.00
@@ -43,8 +43,8 @@ Cell sky130_fd_sc_hd__dlclkp_2
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 0.00-0.00
  GATE input 0.00-0.00
@@ -72,8 +72,8 @@ Cell sky130_fd_sc_hd__dlclkp_4
 Library sky130_fd_sc_hd__tt_025C_1v80
 File ../../test/sky130hd/sky130hd_tt.lib
  VGND ground
- VNB unknown
- VPB unknown
+ VNB bias
+ VPB bias
  VPWR power
  CLK input 0.00-0.01
  GATE input 0.00-0.00
@@ -98,8 +98,8 @@ Timing arcs
   v -> v
 sky130_fd_sc_hd__sdlclkp_1 area=18.768000
   VGND dir=ground func=
-  VNB dir=unknown func=
-  VPB dir=unknown func=
+  VNB dir=bias func=
+  VPB dir=bias func=
   VPWR dir=power func=
   CLK dir=input func=
   GATE dir=input func=
@@ -108,8 +108,8 @@ sky130_fd_sc_hd__sdlclkp_1 area=18.768000
   SCE dir=input func=
 sky130_fd_sc_hd__sdlclkp_2 area=20.019199
   VGND dir=ground func=
-  VNB dir=unknown func=
-  VPB dir=unknown func=
+  VNB dir=bias func=
+  VPB dir=bias func=
   VPWR dir=power func=
   CLK dir=input func=
   GATE dir=input func=
@@ -118,8 +118,8 @@ sky130_fd_sc_hd__sdlclkp_2 area=20.019199
   SCE dir=input func=
 sky130_fd_sc_hd__sdlclkp_4 area=22.521601
   VGND dir=ground func=
-  VNB dir=unknown func=
-  VPB dir=unknown func=
+  VNB dir=bias func=
+  VPB dir=bias func=
   VPWR dir=power func=
   CLK dir=input func=
   GATE dir=input func=