Update project import limit

changelogs/unreleased/georgekoltsov-bump-project-import-limit.yml

+---
+title: Update Project Import API rate limit
+merge_request: 26903
+author:
+type: other

doc/user/project/settings/import_export.md

@@ -142,4 +142,4 @@ To help avoid abuse, users are rate limited to:
 | ---------------- | --------------------------- |
 | Export           | 1 project per 5 minutes     |
 | Download export  | 10 projects per 10 minutes  |
-| Import           | 30 projects per 10 minutes  |
+| Import           | 30 projects per 5 minutes  |

lib/gitlab/application_rate_limiter.rb

@@ -23,7 +23,7 @@ module Gitlab
           project_download_export:     { threshold: 10, interval: 10.minutes },
           project_repositories_archive: { threshold: 5, interval: 1.minute },
           project_generate_new_export: { threshold: 1, interval: 5.minutes },
-          project_import:              { threshold: 30, interval: 10.minutes },
+          project_import:              { threshold: 30, interval: 5.minutes },
           play_pipeline_schedule:      { threshold: 1, interval: 1.minute },
           show_raw_controller:         { threshold: -> { Gitlab::CurrentSettings.current_application_settings.raw_blob_request_limit }, interval: 1.minute }
         }.freeze