ci: fix secret name

.github/workflows/dependabot-post.yml

@@ -32,7 +32,7 @@ jobs:
           git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
           git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
 
       # NOTE: Prefixing/appending commit messages with `[dependabot skip]`
       # allows dependabot to rebase/update the pull request, force-pushing