Merge remote-tracking branch 'origin/feature/gsk-2574-improve-release-step' into feature/gsk-2574-better-slack-notifications

Author: BotReleaser

.github/workflows/post-release.yml

@@ -112,9 +112,10 @@ jobs:
         with:
           # Slack channel id, channel name, or user id to post message.
           # See also: https://api.slack.com/methods/chat.postMessage#channels
-          channel-id: ${{ secrets.SLACK_CHANNEL_ID }}
+          # On special mentions: https://api.slack.com/reference/surfaces/formatting#special-mentions
+          channel-id: ${{ vars.SLACK_CHANNEL_ID }}
           slack-message: |
-            <@channel> New library release: ${{ env.VERSION_NAME }} :tada:
+            <!channel> New library release: ${{ env.VERSION_NAME }} :tada:
             [Release notes](${{ steps.github-release.outputs.url }}) | [PyPI](https://pypi.org/project/giskard/${{ env.VERSION_NUMBER }})
           # reploy_broadcast == also send to channel
           payload: |