fix(cloud-sql): fix region tag (GoogleCloudPlatform#1160)

Author: shubha-rajan

cloud_sql/sqlserver/pdo/src/app.php

@@ -41,11 +41,11 @@
     $host = getenv('DB_HOST');
 
     try {
-        // # [START cloud_sql_sqlserver_pdo_create_tcp]
-        // // $username = 'your_db_user';
-        // // $password = 'yoursupersecretpassword';
-        // // $db_name = 'your_db_name';
-        // // $host = "127.0.0.1";
+        # [START cloud_sql_sqlserver_pdo_create_tcp]
+        // $username = 'your_db_user';
+        // $password = 'yoursupersecretpassword';
+        // $db_name = 'your_db_name';
+        // $host = "127.0.0.1";
 
         $dsn = sprintf('sqlsrv:server=%s;Database=%s', $host, $db_name);