chore(endpoints): step 1 add new region tag (#10015)

Author: alarconesparza

endpoints/getting-started/openapi.yaml

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# [START endpoints_swagger_yaml_java]
 # [START swagger]
 swagger: "2.0"
 info:
@@ -20,6 +21,7 @@ info:
   version: "1.0.0"
 host: "echo-api.endpoints.YOUR-PROJECT-ID.cloud.goog"
 # [END swagger]
+# [END endpoints_swagger_yaml_java]
 consumes:
   - "application/json"
 produces: