CI: Use GH_TOKEN instead of GITHUB_TOKEN for GitHub CLI (#3175)

Author: seisman

.github/workflows/check-links.yml

@@ -72,4 +72,4 @@ jobs:
         title="Link Checker Report on ${{ steps.date.outputs.date }}"
         gh issue create --title "$title" --body-file ./lychee/out.md
         env:
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}