Fix monthly tags #2 (#8557)

* fix monthly tags

* explicitly set GITHUB_TOKEN

* debug

* Update monthly-tag.yml

* Revert "debug"

This reverts commit 041735d1e5ee78fbb54a841f8fe87a0ba7f1098b and
9ed60840e1647f4e0a5797776a68f0faa0569713

substrate/.github/workflows/monthly-tag.yml

@@ -22,6 +22,8 @@ jobs:
           fetch-depth: 0
       - name: Generate changelog
         id: changelog
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           echo "# Automatic snapshot pre-release ${{ steps.tags.outputs.new }}" > Changelog.md
           echo "" >> Changelog.md