Use github token

Author: jjppp

.github/workflows/checkstyle.yml

@@ -32,6 +32,6 @@ jobs:
 
       - name: Run reviewdog
         env:
-          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.REVIEW_DOG_TOKEN }}
+          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           cat build/reports/checkstyle/*.xml | reviewdog -f=checkstyle -reporter=github-pr-review -fail-level=any