chore(deps): update slackapi/slack-github-action action to v1.27.1 (#2977)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/slack-pr-notification.yml

@@ -21,7 +21,7 @@ jobs:
       contains(toJson(github.event.pull_request.labels.*.name), '"RFC"')
     steps:
     - name: Notify Slack
-      uses: slackapi/slack-github-action@37ebaef184d7626c5f204ab8d3baff4262dd30f0 # v1.27.0
+      uses: slackapi/slack-github-action@fcfb566f8b0aab22203f066d80ca1d7e4b5d05b3 # v1.27.1
       with:
         channel-id: ${{ env.channel }}
         slack-message: "${{ github.actor }} posted a RFC: ${{ github.event.pull_request.title }}. URL: ${{ github.event.pull_request.html_url }}"