Potential fix for code scanning alert no. 6: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: BattlefieldDuck

.github/workflows/dotnet-publish-gpr.yml

@@ -4,6 +4,10 @@ on:
   release:
     types: [created]
 
+permissions:
+  contents: read
+  packages: write
+
 jobs:
   deploy:
     runs-on: ubuntu-latest