add check out

.github/workflows/wiki_gen.yml

@@ -42,6 +42,12 @@ jobs:
         env:
           GH_PERSONAL_ACCESS_TOKEN: ${{ secrets.GIT_TOKEN }}
 
+      - name: Check out master first
+        uses: actions/checkout@master
+        with:
+          persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
+          fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
+
       - name: Commit & Push changes
         uses: actions-js/push@master
         with: