[mkdocs] umap module error

[robertclaus]

• In ml-tsne-umap-projections.md, from umap import UMAP throws a Module not Found error.
• Fixed if you do uv pip install umap-learn, but will throw a warning: UserWarning: n_jobs value 1 overridden to 1 by setting random_state. Use no seed for parallelism. because random_state=0.