ci: update git push action for secure authentication

- Replace the old git push action with a new one from a different repository
    - Remove commands for git configuration and committing/pushing code
    - Add new parameters for the git push action, including a commit message and remote repository information
    - Use a secret key for authentication in the git push action

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.gitea/workflows/update.yaml

@@ -13,9 +13,12 @@ jobs:
       - name: update
         run: ./bump_version.sh
       - name: commit
-        run: |
-          git config --global user.email "teabot@gitea.io"
-          git config --global user.name "GiteaBot"
-          git add --all
-          git commit -m "[skip ci] Updated Version via cron" || true
-          git push origin main
+        uses: https://github.com/appleboy/git-push-action@v0.0.2
+        with:
+          author_email: "teabot@gitea.io"
+          author_name: GiteaBot
+          branch: main
+          commit: true
+          commit_message: "[skip ci] Updated Version via cron"
+          remote: "git@gitea.com:gitea/act_runner.git"
+          ssh_key: ${{ secrets.DEPLOY_KEY }}