build: streamline and update python deps (#5264)

- Update deps to latest versions
- stop using tight constraints and instead just use loose ones and commit the uv lockfile
- Greater reproducibility, and much easier to bump deps in future.

Co-authored-by: Darragh Elliott <me@delliott.net>
Reviewed-on: #5264

pre-commit.Dockerfile

@@ -31,7 +31,7 @@ WORKDIR /website-source
 
 # Copy the pyproject and build deps
 # Done in a seperate step for optimal docker caching
-COPY ./pyproject.toml .
+COPY ./pyproject.toml ./uv.lock .
 RUN uv sync --no-install-package fsfe_website_build --group dev
 # Copy everything else
 COPY . .