docs: record mkdocstrings fix in journal

Author: apiad

journal/2026-03-11.md

@@ -7,4 +7,5 @@
 - Refined `/onboard` to include discovery of the `docs/` folder or key source code files.
 - Implemented a comprehensive project documentation suite in the `docs/` directory (Overview, Deployment, Design, and Development guides).
 - Integrated MkDocs with Material theme and configured automatic GitHub Pages deployment via GitHub Actions.
+- Fixed a `TypeError` in the MkDocs deployment workflow by updating the `mkdocstrings` configuration.
 - Refined the `/plan` command to strictly enforce a non-execution mandate, ensuring plans are only analyzed, verified, and saved.