chore(core): update changelog

CHANGELOG.md

@@ -102,6 +102,14 @@
 * **admin-plugin:** show message on plugins page if no plugins installed #294
 * **admin-plugin:** use dots icon for actions dropdown #292
 * **admin-plugin:** YAML parsing will be cached in production #263
+* **admin-plugin:** add ability to hide fieldsets from entries type select #304  
+
+    usage in fieldsets:
+    ```
+    hide: true
+    ```
+    by default `hide` is `false`
+
 * **site-plugin:** add routable option for entries #284