CHANGELOG: Move version notes.

No need to post these in all release notes.

CHANGELOG.md

@@ -2,12 +2,4 @@
 
 See [pybricks-micropython/CHANGELOG.md][changelog] for the changes in each release.
 
-This repository is frequently updated to stay in sync with the implementation.
-
-Major and minor versions are synchronized with `pybricks-micropython`, which
-leads. Patch versions and prerelease version numbers may differ, as they may
-be bumped for every small change or typo in the docs.
-
-The version for this repository is also used for the `@pybricks/jedi` and `@pybricks/ide-docs` npm packages.
-
 [changelog]: https://github.com/pybricks/pybricks-micropython/blob/master/CHANGELOG.md

CONTRIBUTING.md

@@ -168,6 +168,18 @@ Building all release artifacts (docs, jedi, npm packages):
     # Linux/macOS only
     ./build-all.sh
 
+** version notes **
+
+This repository is frequently updated to stay in sync with the firmware
+implementation.
+
+Major and minor versions are synchronized with `pybricks-micropython`, which
+leads. Patch versions and prerelease version numbers may differ, as they may
+be bumped for every small change or typo in the docs.
+
+The version for this repository is also used for the `@pybricks/jedi` and
+`@pybricks/ide-docs` npm packages.
+
 [vscode]: https://code.visualstudio.com/
 [git]: https://git-scm.com/
 [python]: https://www.python.org/