chore: update slackapi/slack-github-action action to v3

Author: renovate[bot]

.github/workflows/SEND_MESSAGE.yml

@@ -20,7 +20,7 @@ jobs:
       id: report
       run: echo "message=$(node ./bin/cli.js --format=slack)" >> "$GITHUB_OUTPUT"
     - name: Post to a Slack channel
-      uses: slackapi/slack-github-action@v2
+      uses: slackapi/slack-github-action@v3
       with:
         method: chat.postMessage
         token: ${{ secrets.SLACK_BOT_TOKEN }}