chore(meta): Add CODEOWNERS coverage for markdownTextArea

Add an explicit owner for static/app/components/markdownTextArea.tsx so the branch clears the CODEOWNERS coverage check.

The file was missing ownership coverage entirely, which caused the fresh PR run to fail even though the API changes on this branch are backend-only.

Co-Authored-By: OpenAI Codex <noreply@openai.com>

Author: dcramer

.github/CODEOWNERS

@@ -437,6 +437,7 @@ tests/sentry/api/endpoints/test_organization_attribute_mappings.py          @get
 /static/app/components/analyticsArea.spec.tsx  @getsentry/app-frontend
 /static/app/components/analyticsArea.tsx       @getsentry/app-frontend
 /static/app/components/loading/                @getsentry/app-frontend
+/static/app/components/markdownTextArea.tsx    @getsentry/app-frontend
 /static/app/components/events/interfaces/      @getsentry/app-frontend
 /static/app/components/forms/                  @getsentry/app-frontend
 /static/app/locale.tsx                         @getsentry/app-frontend