Update CHANGELOG for v0.3.0 release

Author: dazuma

toys-release/CHANGELOG.md

@@ -2,15 +2,16 @@
 
 ### v0.3.0 / 2025-12-06
 
-* BREAKING CHANGE: Remove component types to simplify configuration mechanism
-* ADDED: Provided a gen-config tool
-* ADDED: Support different options for handling collisions during file copies
-* ADDED: Support for per-component overrides of commit tag behavior
-* ADDED: Remove component types to simplify configuration mechanism
-* ADDED: Check for unknown or misspelled keys when loading configuration
-* ADDED: The gen-config tool now generates git_user_name and git_user_email fields
-* ADDED: Update the release pull request when the release automation starts
-* DOCS: Initial work on the users guide
+This release includes fairly substantial changes, a few of them breaking, to the configuration mechanism:
+* Component types have been removed. You can customize the pipeline for specific components, but there are no longer any predefined "categories" of components.
+* Commit tag handling can be overridden for specific components.
+* Added a configuration to control how collisions during file copies (in inputs and outputs) are resolved.
+* Unknown or misspelled keys in the configuration now trigger an error.
+
+Aditional changes:
+* Renamed the gen-settings tool to gen-config and expanded its capabilities, including generating git_user_name and git_user_email.
+* When the release automation starts, it posts a comment on the release pull request with a link to its logs.
+* Initial work on the users guide.
 
 ### v0.2.2 / 2025-11-30