[DOCS] Fix link in list of Kibana plugins (elastic#141514) (elastic#141691)

(cherry picked from commit 2892481)

Co-authored-by: Lisa Cawley <[email protected]>

Author: kibanamachine

docs/developer/plugin-list.asciidoc

@@ -520,7 +520,6 @@ routes, etc.
 
 |{kib-repo}blob/{branch}/x-pack/plugins/task_manager/README.md[taskManager]
 |The task manager is a generic system for running background tasks.
-Documentation: https://www.elastic.co/guide/en/kibana/master/task-manager-production-considerations.html
 
 
 |{kib-repo}blob/{branch}/x-pack/plugins/telemetry_collection_xpack/README.md[telemetryCollectionXpack]

x-pack/plugins/task_manager/README.md

@@ -1,7 +1,8 @@
 # Kibana task manager
 
 The task manager is a generic system for running background tasks.
-Documentation: https://www.elastic.co/guide/en/kibana/master/task-manager-production-considerations.html
+
+Documentation: https://www.elastic.co/guide/en/kibana/current/task-manager-production-considerations.html
 
 It supports:
 - Single-run and recurring tasks