Reorganise changelog

Author: JohnnyMorganz

CHANGELOG.md

@@ -6,17 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+### Changed
+
+- Sync to upstream Luau 0.661
+
 ### Fixed
 
 - Fixed unintended bump of minimum supported macOS version in 1.39.0 to macOS 14. The language server binary supports a minimum version of macOS 10.15
 - Single-line documentation comments (`---`) now correctly preserve newlines ([#917](https://github.com/JohnnyMorganz/luau-lsp/pull/917)).
 - Fixed stack-use-after-free crash in sourcemap definition magic functions when the new solver is
   enabled ([#928](https://github.com/JohnnyMorganz/luau-lsp/issues/928))
 
-### Changed
-
-- Sync to upstream Luau 0.661
-
 ## [1.39.1] - 2025-02-08
 
 ### Fixed