Merge branch 'eread/backport-typo-fix-from-master' into '14-10-stable-ee'

Backport documentation typo fix from master branch

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120695Merged-by: Steve Abrams <sabrams@gitlab.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Approved-by: Mayra Cabrera <mcabrera@gitlab.com>
Approved-by: Steve Abrams <sabrams@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>

doc/update/index.md

@@ -471,7 +471,7 @@ that may remain stuck permanently in a **pending** state.
 
     ```ruby
         Gitlab::Database::BackgroundMigrationJob.pending.where(class_name: "PopulateTopicsNonPrivateProjectsCount").find_each do |job|
-          puts Gitlab::Database::BackgroundMigrationJob.mark_all_as_succeeded("PopulateTopicsNonPrivateProjectsCountq", job.arguments)
+          puts Gitlab::Database::BackgroundMigrationJob.mark_all_as_succeeded("PopulateTopicsNonPrivateProjectsCount", job.arguments)
         end
     ```