refactor(just): rename dev recipe to sync

Author: zigai

template/CONTRIBUTING.md.jinja

@@ -10,7 +10,7 @@ We use [uv](https://docs.astral.sh/uv/) for project management, [Hatch](https://
 To install this package and its development dependencies, run:
 
 ```sh
-just dev
+just sync
 ```
 
 or

template/Justfile

@@ -28,7 +28,7 @@ build: _require-uv
   uv build
 
 # setup or update local dev environment, keeps previously installed extras
-dev: _require-uv
+sync: _require-uv
   uv sync --inexact --extra dev
   uv run pre-commit install