add missing stuff to changelog

Author: Aran-Fey

changelog.md

@@ -3,10 +3,12 @@
 -   Buttons now have a smaller minimum size when using a `rio.Component` as
     content
 -   `FrostedGlassFill` added
--   `rio.Fill` deprecated. Most components only support specific fills, so this
-    base class has no purpose any more
+-   `rio.Fill` and `rio.FillLike` deprecated. Most components only support
+    specific fills, so these have no purpose any more
 -   added `@rio.event.on_window_size_change`
 -   popups now default to the "hud" color
+-   Add HTML meta tags
+-   Add functions for reading and writing clipboard contents to the `Session`
 
 ## 0.8