Update README, snap version, and tag

Author: github-actions[bot]

README.md

@@ -469,7 +469,7 @@ also often get polled from the printer.
   - pnm2ppa debian/1.13-13
   - c2esp debian/27-11
   - dymo-cups-drivers debian/1.4.0-12
-  - foo2zjs debian/20200505dfsg0-3
+  - foo2zjs debian/20200505dfsg0-4
   - fxlinuxprint debian/1.1.0+ds-4
   - m2300w debian/0.51-15
   - printer-driver-oki 1.0.2

rockcraft.yaml

@@ -1,6 +1,6 @@
 name: ghostscript-printer-app
 base: ubuntu@22.04
-version: '10.06.0-1'
+version: '10.06.0-2'
 summary: Ghostscript Printer Application
 description: |
   The Ghostscript Printer Application is a PAPPL (Printer Application
@@ -998,7 +998,7 @@ parts:
     # HPLIP Printer Application (with plugin loaded in-app) should be used.
     source: https://salsa.debian.org/printing-team/foo2zjs.git
     source-type: git
-    source-tag: 'debian/20200505dfsg0-3'
+    source-tag: 'debian/20200505dfsg0-4'
     source-depth: 1
 # ext:updatesnap
 #   version-format: