Adding changelog items

Modules/Core/changelog.yml

 url: https://github.com/AsgardCms/Platform
 versions:
+    "3.5.0@unreleased":
+        changed:
+            - Whitespace in `config/filesystems.php` causing issues on some configurations, hooray.
     "3.4.0":
         changed:
             - Define the warning callback on the SetAppKey

Modules/Media/changelog.yml

 url: https://github.com/AsgardCms/Platform
 versions:
+    "3.5.1@unreleased":
+        changed:
+            - Modify media controller to use Imagy non-statically
     "3.5.0":
         changed:
             - Let File implement the <code>Responsable</code> interface which allows it being returned from a controller directly.