Fix Docs for Trails Leader By (#17763)

* init

* fix tests

* added -detailed in docs

* added change log

* fix doc

* checking for entry in map

* fix tests

* removed detailed flag

* removed detailed flag

* revert unwanted changes

* removed unwanted changes

* updated change log

* pr review comment changes

* pr comment changes single API instead of two

* fix change log

* fix tests

* fix tests

* fix test operator raft endpoint test

* Update .changelog/17582.txt

Co-authored-by: Semir Patel <semir.patel@hashicorp.com>

* nits

* updated docs

* explanation added

* fix doc

* fix docs

---------

Co-authored-by: Semir Patel <semir.patel@hashicorp.com>

website/content/commands/operator/raft.mdx

@@ -68,7 +68,7 @@ configuration.
 
 `Commit Index` is the last log index the server has a record of in its Raft log.
 
-`Trails Leader By` is the difference in commit index the server has from the leader.
+`Trails Leader By` is the number of commits a follower trails the leader by.
 
 #### Command Options