chore(deps): update slackapi/slack-github-action action to v2

Author: renovate[bot]

.github/workflows/release.yml

@@ -68,7 +68,7 @@ jobs:
       - name: Send a Slack notification on publish
         if: steps.changesets.outcome == 'success' && steps.changesets.outputs.published == 'true'
         id: slack
-        uses: slackapi/slack-github-action@v1.27.0
+        uses: slackapi/slack-github-action@v2.0.0
         with:
           # Slack channel id, channel name, or user id to post message
           # See also: https://api.slack.com/methods/chat.postMessage#channels