fix(ci): grant contents:write to deploy-pages for GitHub Pages push

The workflow-level contents:read blocked peaceiris/actions-gh-pages from
pushing the built static site to the gh-pages branch. Setting it to write
allows release uploads and Pages deployment.

Author: owaindjones

.github/workflows/ci.yml

@@ -364,7 +364,7 @@ jobs:
     needs: [package-arch-pkgbuild]
     runs-on: ubuntu-latest
     permissions:
-      contents: read
+      contents: write
       pages: write
       id-token: write
     environment: