Update CHANGELOG.md

Author: andrew

CHANGELOG.md

@@ -4,6 +4,11 @@
 - Fix N+1 queries in `blame`, `stale`, `stats`, and `log` commands
 - Configuration via git config: `pkgs.ecosystems`, `pkgs.ignoredDirs`, `pkgs.ignoredFiles`
 - `git pkgs info --ecosystems` to show available ecosystems and their status
+- `-q, --quiet` flag to suppress informational messages
+- `git pkgs diff` now supports `commit..commit` range syntax
+- `--git-dir` and `--work-tree` global options (also respects `GIT_WORK_TREE` env var)
+- Grouped commands by category in help output
+- Fix crash when parsing manifests that return no dependencies
 
 ## [0.4.0] - 2026-01-04