Merge branch '251080-igress-modsecurity-feature-flag' into 'master'

Update details about ingress_modsecurity flag

See merge request gitlab-org/gitlab!43668

config/feature_flags/development/ingress_modsecurity.yml

 ---
 name: ingress_modsecurity
-introduced_by_url: 
-rollout_issue_url: 
-group: 
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20194
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/258554
+group: "group::container security"
 type: development
 default_enabled: false