Updated ci/cd to use GitHub token.

Author: KristofferStrube

.github/workflows/main.yml

@@ -30,7 +30,7 @@ jobs:
           if: ${{ github.ref == 'refs/heads/main' }} # Publish only when the push is on main
           uses: peaceiris/actions-gh-pages@v3.6.1
           with:
-            github_token: ${{ secrets.PUBLISH_TOKEN }}
+            github_token: ${{ secrets.GITHUB_TOKEN }}
             publish_branch: gh-pages
             publish_dir: build/wwwroot
             allow_empty_commit: false