Update issues2md.yml

Author: JimmyLv

.github/workflows/issues2md.yml

@@ -15,9 +15,9 @@ jobs:
         fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
     - name: Backup github issues to a markdown file.
       run: |
-        pip install wheel
-        pip install --user gh2md
-        $HOME/.local/bin/gh2md $GITHUB_REPOSITORY issues.md --token ${{ secrets.GITHUB_TOKEN }}
+        pip3 install --user --upgrade setuptools
+        pip3 install --user gh2md
+        $HOME/.local/bin/gh2md $GITHUB_REPOSITORY issues.md --token ${{secrets.GITHUB_TOKEN }} --idempotent
         git add issues.md
     - name: Commit files
       run: |