Fix deprecation and removal for cobertura keyword

The change is a breaking change, but the deprecation
and removal show breaking_change: false

data/deprecations/14-7-deprecate-artifacts-keyword.yml

@@ -3,7 +3,7 @@
   announcement_date: "2022-01-22"
   removal_milestone: "15.0"
   removal_date: "2022-05-22"
-  breaking_change: false
+  breaking_change: true
   body: |
      Currently, test coverage visualizations in GitLab only support Cobertura reports. Starting 15.0, the
      `artifacts:reports:cobertura` keyword will be replaced by

data/removals/15_0/15-0-removal-artifacts-keyword.yml

@@ -3,7 +3,7 @@
   announcement_date: "2022-02-22"
   removal_milestone: "15.0"
   removal_date: "2022-05-22"
-  breaking_change: false
+  breaking_change: true
   body: |
      As of GitLab 15.0, the [`artifacts:reports:cobertura`](https://docs.gitlab.com/ee/ci/yaml/artifacts_reports.html#artifactsreportscobertura-removed)
      keyword has been [replaced](https://gitlab.com/gitlab-org/gitlab/-/issues/344533) by

doc/update/deprecations.md

@@ -1496,12 +1496,16 @@ Tracing in GitLab is an integration with Jaeger, an open-source end-to-end distr
 
 </div>
 
-<div class="deprecation removal-150">
+<div class="deprecation removal-150 breaking-change">
 
 ### `artifacts:reports:cobertura` keyword
 
 Planned removal: GitLab <span class="removal-milestone">15.0</span> (2022-05-22)
 
+WARNING:
+This is a [breaking change](https://docs.gitlab.com/ee/development/contributing/#breaking-changes).
+Review the details carefully before upgrading.
+
 Currently, test coverage visualizations in GitLab only support Cobertura reports. Starting 15.0, the
 `artifacts:reports:cobertura` keyword will be replaced by
 [`artifacts:reports:coverage_report`](https://gitlab.com/gitlab-org/gitlab/-/issues/344533). Cobertura will be the

doc/update/removals.md

@@ -621,6 +621,10 @@ The `Managed-Cluster-Applications.gitlab-ci.yml` CI/CD template is being removed
 
 ### `artifacts:reports:cobertura` keyword
 
+WARNING:
+This is a [breaking change](https://docs.gitlab.com/ee/development/contributing/#breaking-changes).
+Review the details carefully before upgrading.
+
 As of GitLab 15.0, the [`artifacts:reports:cobertura`](https://docs.gitlab.com/ee/ci/yaml/artifacts_reports.html#artifactsreportscobertura-removed)
 keyword has been [replaced](https://gitlab.com/gitlab-org/gitlab/-/issues/344533) by
 [`artifacts:reports:coverage_report`](https://docs.gitlab.com/ee/ci/yaml/artifacts_reports.html#artifactsreportscoverage_report).