Merge branch 'kassio/github-importer-enabled-import_redis_increment_by-by-default' into 'master'

Enable `import_redis_increment_by` by default

See merge request gitlab-org/gitlab!76874

config/feature_flags/development/import_redis_increment_by.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/336226
 milestone: '14.1'
 type: development
 group: group::import
-default_enabled: false
+default_enabled: true