Merge branch 'jnutt/add-skipped-rows' into 'master'

Add skipped row count to docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184444



Merged-by: Ashraf Khamis <akhamis@gitlab.com>
Approved-by: Ashraf Khamis <akhamis@gitlab.com>
Co-authored-by: James Nutt <jnutt@gitlab.com>

doc/user/project/import/_index.md

@@ -419,6 +419,7 @@ After you reassign contributions, GitLab sends you an email with the number of:
 
 - Successfully processed rows
 - Unsuccessfully processed rows
+- Skipped rows
 
 If any rows have not been successfully processed, the email has a CSV file with more detailed results.