Fix enable comment

Author: sethvargo

secretmanager/src/enable_secret_version.php

@@ -45,7 +45,7 @@
 // Build the resource name of the secret version.
 $name = $client->secretVersionName($projectId, $secretId, $versionId);
 
-// Access the secret version.
+// Enable the secret version.
 $response = $client->enableSecretVersion($name);
 
 // Print a success message.