Update README, snap version, and tag

Author: github-actions[bot]

README.md

@@ -402,7 +402,7 @@ also often get polled from the printer.
 ## Included Components
   - pappl v1.4.9
   - qpdf v11.10.1
-  - ghostscript ghostpdl-10.05.0-test-base-001
+  - ghostscript ghostpdl-10.05.1rc1_test002
   - cups v2.4.12
   - libcupsfilters 2.1.1
   - libppd 2.1.1

rockcraft.yaml

@@ -1,6 +1,6 @@
 name: ps-printer-app
 base: ubuntu@22.04
-version: '20240504-19'
+version: '20240504-20'
 summary: PostScript Printer Application
 description: |
   The PostScript Printer Application is a PAPPL (Printer Application Framework) based Printer Application
@@ -198,7 +198,7 @@ parts:
     #source: https://git.ghostscript.com/ghostpdl.git
     source: https://github.com/ArtifexSoftware/ghostpdl.git
     source-type: git
-    source-tag: 'ghostpdl-10.05.0-test-base-001'
+    source-tag: 'ghostpdl-10.05.1rc1_test002'
     source-depth: 1
 # ext:updatesnap
 #   version-format: