fix: remove frozen project build during doc generation

[Qazalbash]

No description provided.

[juanitorduz]

how can we test this? (or just locally?)

[Qazalbash]

how can we test this? (or just locally?)

I tested it locally it is working.

$ uv venv -p 3.13
$ source .venv/bin/activate
(numpyro) $ rm uv.lock
(numpyro) $ uv sync --upgrade --all-extra

This is how you can test it.

I wanted #2129 to be merged after this discussion concluded. I had a uv.lock file locally, so I missed the --frozen flag, and it ended upstream.