fix: create personal access token that allows writing

See angular-schule/angular-cli-ghpages#20 (comment) for more info.

Author: EdricChan03

.github/workflows/main.yml

@@ -22,4 +22,4 @@ jobs:
     - name: Run githubPages npm script
       run: npm run githubPages
       env:
-        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        GH_TOKEN: ${{ secrets.DEPLOY_GH_PAGES_TOKEN }}