Add patch for codesnippet

patches/d9.json

@@ -26,6 +26,9 @@
     "drupal/ckeditor_find": {
       "#3252081 Library location": "https://git.drupalcode.org/project/ckeditor_find/-/merge_requests/2.diff"
     },
+    "drupal/codesnippet": {
+      "#3021431 Add Yaml as code format": "https://git.drupalcode.org/project/codesnippet/-/merge_requests/4.diff"
+    },
     "drupal/colorbox": {
       "#2808883 Responsive image styles": "https://git.drupalcode.org/project/colorbox/-/merge_requests/13.diff"
     },