chore(main): update codeowners for o11y frontend squad (#1499)

Update CODEOWNERS for O11y Frontend squad

Updating the CODEOWNERS file after renaming the team to o11y-frontend

Author: rrmf

CODEOWNERS

@@ -4,9 +4,9 @@
 # someone opens a pull request.
 * @grafana/platform-productivity
 
-# Owned by the Grafana department's Infra O11y Frontend squad
-.github/workflows/build-lint-pr.yml  @grafana/infra-o11y-frontend
-/actions/lint-pr-title/              @grafana/infra-o11y-frontend @grafana/platform-productivity
+# Owned by the O11y department's Frontend squad
+.github/workflows/build-lint-pr.yml  @grafana/o11y-frontend
+/actions/lint-pr-title/              @grafana/o11y-frontend @grafana/platform-productivity
 
 # Platform CAT
 /actions/generate-openapi-clients @grafana/platform-cat