Change back to GITHUB_TOKEN for authentification.

Forgot to change the GITHUB_TOKEN itself, in the previous commit.

Author: suikan4github

.github/workflows/deploy_pages.yaml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: DenverCoder1/doxygen-github-pages-action@v2.0.0
         with:
-          github_token: ${{ secrets.DOXYGEN_GH_PAGE }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}
           branch: gh-pages
           folder: docs/html
           config_file: Doxyfile