chore: update SQL Server sample region tags. (GoogleCloudPlatform#1208)

Author: jsimonweb

cloud_sql/sqlserver/pdo/src/Votes.php

@@ -110,6 +110,7 @@ public function insertVote(string $value): bool
         $res = false;
 
         # [START cloud_sql_server_pdo_connection]
+        # [START cloud_sql_sqlserver_pdo_connection]
         // Use prepared statements to guard against SQL injection.
         $sql = "INSERT INTO votes (time_cast, vote_value) VALUES (GETDATE(), :voteValue)";
 
@@ -126,6 +127,7 @@ public function insertVote(string $value): bool
                 $e
             );
         }
+        # [END cloud_sql_sqlserver_pdo_connection]
         # [END cloud_sql_server_pdo_connection]
 
         return $res;

cloud_sql/sqlserver/pdo/src/app.php

@@ -51,14 +51,16 @@
 
         // Connect to the database.
         # [START cloud_sql_server_pdo_timeout]
+        # [START cloud_sql_sqlserver_pdo_timeout]
         // Here we set the connection timeout to five seconds and ask PDO to
         // throw an exception if any errors occur.
         $conn = new PDO($dsn, $username, $password, [
             PDO::ATTR_TIMEOUT => 5,
             PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
         ]);
+        # [END cloud_sql_sqlserver_pdo_timeout]
         # [END cloud_sql_server_pdo_timeout]
-        # [END cloud_sql_server_pdo_create_tcp]
+        # [END cloud_sql_sqlserver_pdo_create_tcp]
     } catch (TypeError $e) {
         throw new RuntimeException(
             sprintf(