Rename section to Pod lifetime annotations

Author: sbernauer

modules/concepts/pages/operations/temporary_credentials_lifetime.adoc

@@ -67,7 +67,7 @@ Similar to the example above, users can configure the lifetime of temporary cred
 * Apache Zookeeper
 * Trino
 
-== Check the lifetime
+== Pod lifetime annotations
 
 After configuring the lifetime as described above you could simply observe your stacklet for a week/month (or whatever your new lifetime is), to see if your changes take effect.
 However, it's much quicker to check at what point of time your Pods will be restarted next.