Potential fix for code scanning alert no. 7: Workflow does not contain permissions

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

Author: VisualBean

.github/workflows/release-beta.yml

@@ -1,7 +1,9 @@
 name: Publish beta NuGet package
 on:
   workflow_dispatch:
-
+permissions:
+  contents: read
+  packages: write
 jobs:
   check:
     runs-on: ubuntu-latest