changelog.md: Add more notes on changes

Author: charlespascoe

changelog.md

@@ -6,15 +6,23 @@
 
 - Significantly refactor and improve syntax code, including refactoring various
   "hacks"
-    - Removing these has improved performance
+    - It now only looks for expressions and statements where they are expected
+      to be; please open an issue if certain syntax elements aren't highlighted
+      correctly.
 - Make the syntax sync behaviour more consistent
-- Various small performance tweaks
+- Various small performance improvements
 
 ### Removed
 
-- Generics in interfaces (I'm not sure why I added these in the first place)
+- Removed generics in interface methods (I'm not sure why I added these in the
+  first place)
 
-## Version 0.1.0 (2022/12/26)
+### Fixed
+
+- Fix issue with slice of pointer type not highlighting user-defined types
+  correctly
+
+## Version 0.1.0 - 2022/12/26
 
 - First version. This syntax is still being developed and may have breaking
   changes.