Update .github/workflows/slack.yml

Signed-off-by: Saurabh Singh <saurabhsraghuvanshi@gmail.com>

Author: saurabhraghuvanshii

.github/workflows/slack.yml

@@ -17,7 +17,7 @@ jobs:
           echo "STARS=$(curl --silent 'https://api.github.com/repos/${{ github.repository }}' -H 'Accept: application/vnd.github.preview' | jq '.stargazers_count')" >> $GITHUB_ENV
 
       - name: Notify Slack
-        uses: slackapi/slack-github-action@v2
+        uses: slackapi/slack-github-action@v2.1.1
         with:
           method: chat.postMessage
           token: ${{ secrets.SLACK_BOT_TOKEN }}