docs(fix): add tags

Author: nerda-codes

tutorials/configure-slack-alerting/index.mdx

@@ -7,6 +7,7 @@ content:
   paragraph: Learn how to send your Cockpit alert notifications to your Slack channels for more efficient monitoring.
 categories:
   - cockpit
+tags: cockpit alerts monitoring notifications slack
 dates:
   validation: 2025-02-18
   posted: 2025-02-18