Minor doc clean up

[junpenglao]

• example using oyrx is currently broken (Import error under JAX 4.1 jax-ml/oryx#25)

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[codecov]

Codecov Report

Merging #428 (6481f69) into main (cc5d3f5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #428   +/-   ##
=======================================
  Coverage   89.99%   89.99%           
=======================================
  Files          47       47           
  Lines        2189     2189           
=======================================
  Hits         1970     1970           
  Misses        219      219           

Impacted Files	Coverage Δ
blackjax/kernels.py	99.55% <ø> (ø)

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