Update CODEOWNERS (#424)

Uncomments devrel-admin entry; still need to figure out why these are being flagged as incorrect.

Author: willum070

.github/CODEOWNERS

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-#.github/ @googlemaps-samples/devrel-admin
+.github/ @googlemaps-samples/devrel-admin
 .github/auto-approve.yml  @googleapis/github-automation
 dist/samples/*/index.js @willum070 @wangela
 samples/*/src/index.ts @willum070 @wangela