doveadm: Change example for service status to list service that exists in core

Author: slusarz

docs/core/man/doveadm-service-status.1.md

@@ -73,7 +73,7 @@ containing the following details:
 doveadm service status
 ```
 ```
-name: fs-auth
+name: imap-login
 process_count: 0
 process_avail: 0
 process_limit: 1
@@ -86,8 +86,6 @@ listen_pending: n
 listening: y
 doveadm_stop: n
 process_total: 0
-
-name: fs-server
 ```
 
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