Add missing compiler features to changelog

CHANGELOG.md

@@ -1,6 +1,41 @@
 # Changelog
 
-### 26th May 2026: `STRINGIFY` built-in macro [(#290)](https://github.com/aspizu/goboscript/pull/290)
+### 30th September 2026: Unused variable and list warnings [(#387)](https://github.com/aspizu/goboscript/pull/387)
+
+The compiler reports unused variables and lists.
+
+### 30th September 2026: Project notes in the Stage [(#386)](https://github.com/aspizu/goboscript/pull/386)
+
+Embed a text file as a Stage comment by setting `notes` in `goboscript.toml`.
+
+```toml
+notes = "NOTES.md"
+```
+
+### 22nd August 2026: Ternary expressions [(#239)](https://github.com/aspizu/goboscript/pull/239)
+
+Use `if (condition) true_value else false_value` inside expressions, including
+nested ternaries.
+
+```goboscript
+say if (score > 100) "winner" else "loser";
+```
+
+### 15th August 2026: Generated Scratch script layout [(#366)](https://github.com/aspizu/goboscript/pull/366)
+
+Generated scripts are arranged vertically with spacing based on their block sizes
+and ordered by event type, making them easier to browse in Scratch.
+
+### 1st August 2026: Fixed-length list initialization [(#363)](https://github.com/aspizu/goboscript/pull/363)
+
+Initialize a list with a repeated value using `[value; length]`. This also works
+with struct-typed lists. The maximum length is 200,000 items.
+
+```goboscript
+list scores = [0; 1000];
+```
+
+### 26th May 2026: `STRINGIFY` built-in macro [(#268)](https://github.com/aspizu/goboscript/pull/268)
 
 ```goboscript
 STRINGIFY(hello world) # becomes "hello world"