fix if condition in workflow

.github/workflows/make_and_send_alert.yml

@@ -26,12 +26,8 @@ jobs:
           git checkout main
           pip install -r requirements.txt
 
-      - name: Inspect contexts.
-        run: |
-          echo "${{ toJson(github) }}"
-
       - name: Send alert to Telegram channel.
-        if: github.actor == 'GitHub-Action'
+        if: github.event.head_commit.author == 'GitHub Action'
         env:
           COMMIT_SHA: ${{ github.sha }}
           TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}