chore: put markdown table in a codeblock

Google APIs · copybara-github · commit 700afd1f0baf · 2021-01-06T13:19:14.000-08:00
PiperOrigin-RevId: 350414815
diff --git a/google/analytics/admin/v1alpha/analytics_admin.proto b/google/analytics/admin/v1alpha/analytics_admin.proto
@@ -650,11 +650,13 @@ message ListPropertiesRequest {
   // `firebase_project:`(The id or number of the linked firebase project).
   // Some examples of filters:
   //
+  // ```
   // | Filter                      | Description                               |
   // |-----------------------------|-------------------------------------------|
   // | parent:accounts/123         | The account with account id: 123.         |
   // | firebase_project:project-id | The firebase project with id: project-id. |
   // | firebase_project:123        | The firebase project with number: 123.    |
+  // ```
   string filter = 1 [(google.api.field_behavior) = REQUIRED];
 
   // The maximum number of resources to return. The service may return
