add ilo5 2.31 to firmware conf

Author: Sean O'Brien

firmware.conf

@@ -569,9 +569,9 @@ url = https://downloads.hpe.com/pub/softlib2/software1/sc-linux-fw-ilo/p19212242
 file = ilo4_275.bin
 
 [ilo5]
-version = 2.30
-url = https://downloads.hpe.com/pub/softlib2/software1/fwpkg-ilo/p991377599/v167897/ilo5_230.fwpkg
-file = ilo5_230.bin
+version = 2.31
+url = https://downloads.hpe.com/pub/softlib2/software1/fwpkg-ilo/p991377599/v182694/ilo5_231.fwpkg
+file = ilo5_231.bin
 
 [ilo5 1.20]
 version = 1.20
@@ -607,3 +607,8 @@ file = ilo5_218.bin
 version = 2.30
 url = https://downloads.hpe.com/pub/softlib2/software1/fwpkg-ilo/p991377599/v167897/ilo5_230.fwpkg
 file = ilo5_230.bin
+
+[ilo5 2.31]
+version = 2.31
+url = https://downloads.hpe.com/pub/softlib2/software1/fwpkg-ilo/p991377599/v182694/ilo5_231.fwpkg
+file = ilo5_231.bin