Extend Apps Infra CODEOWNERS routing to CI and toolchain (#730)

Author: iangmaia

.github/CODEOWNERS

@@ -3,3 +3,10 @@ Gemfile*       @wordpress-mobile/apps-infra-tooling
 .ruby-version  @wordpress-mobile/apps-infra-tooling
 .bundle/       @wordpress-mobile/apps-infra-tooling
 .rubocop*.yml  @wordpress-mobile/apps-infra-tooling
+fastlane/      @wordpress-mobile/apps-infra-tooling
+
+# CI and automation
+.buildkite/            @wordpress-mobile/apps-infra-tooling
+.github/workflows/     @wordpress-mobile/apps-infra-tooling
+.github/dependabot.yml @wordpress-mobile/apps-infra-tooling
+Dangerfile*            @wordpress-mobile/apps-infra-tooling