DOC: fixing yml annotation

docs/en/index.md

@@ -30,32 +30,34 @@ manually, including requesting to have the page excluded from the sitemap.
 Most module configuration is done via the Silverstripe CMS Config API. Create a
 new config file `mysite/_config/googlesitemaps.yml` with the following outline:
 
-    ---
-    Name: customgooglesitemaps
-    After: googlesitemaps
-    ---
-    Wilr\GoogleSitemaps\GoogleSitemap:
-
-enabled: true
-objects_per_sitemap: 1000
-google_notification_enabled: false
-use_show_in_search: true
+```yml
+---
+Name: customgooglesitemaps
+After: googlesitemaps
+---
+Wilr\GoogleSitemaps\GoogleSitemap:
+  enabled: true
+  objects_per_sitemap: 1000
+  google_notification_enabled: false
+  use_show_in_search: true
+```
 
 You can now alter any of those properties to set your needs. A popular option
 is to turn on automatic pinging so that Google is notified of any updates to
 your page. You can set this in the file we created in the last paragraph by
 editing the `google_notification_enabled` option to true
 
-    ---
-    Name: customgooglesitemaps
-    After: googlesitemaps
-    ---
-    Wilr\GoogleSitemaps\GoogleSitemap:
-
-enabled: true
-objects_per_sitemap: 1000
-google_notification_enabled: true
-use_show_in_search: true
+```yml
+---
+Name: customgooglesitemaps
+After: googlesitemaps
+---
+Wilr\GoogleSitemaps\GoogleSitemap:
+  enabled: true
+    objects_per_sitemap: 1000
+    google_notification_enabled: true
+    use_show_in_search: true
+```
 
 ### Including DataObjects