Update sync-main.yml

Author: dilanbhalla

.github/workflows/sync-main.yml

@@ -80,5 +80,4 @@ jobs:
               --body "This PR syncs the latest changes from \`codeql-cli/latest\` into \`main\`."
           fi
         env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_TOKEN: ${{ secrets.WORKFLOW_TOKEN }}