chore: check for slack webhook

Author: iowillhoit

.github/workflows/create-github-release.yml

@@ -106,9 +106,18 @@ jobs:
           token: ${{ secrets.SVC_CLI_BOT_GITHUB_TOKEN }}
           skipIfReleaseExists: true
 
+      - name: Check for Slack webhook
+        id: check-slack
+        run: |
+          if [ -n "$SLACK_WEBHOOK" ]; then
+            echo "has_webhook=true" >> "$GITHUB_OUTPUT"
+          fi
+        env:
+          SLACK_WEBHOOK: ${{ secrets.CLI_ALERTS_SLACK_WEBHOOK }}
+
       - name: Announce if Github Release was skipped
         id: slack
-        if: ${{ steps.changelog.outputs.skipped == 'true' && github.actor != 'dependabot[bot]' && secrets.CLI_ALERTS_SLACK_WEBHOOK != '' }}
+        if: ${{ steps.changelog.outputs.skipped == 'true' && github.actor != 'dependabot[bot]' && steps.check-slack.outputs.has_webhook == 'true' }}
         uses: slackapi/slack-github-action@v1.26.0
         env:
           # for non-CLI-team-owned plugins, you can send this anywhere you like