Fix Long Run Time (bayes_nonconj)

[mmcky]

It is currently taking the cache almost 3 hours to run this lecture set (from scratch).

There are a number of issues reported by tensor flow such as:

/__w/lecture-python.myst/lecture-python.myst/lectures/wealth_dynamics.md: Executing notebook using local CWD [mystnb]
2023-03-22 01:10:05.558920: E external/org_tensorflow/tensorflow/compiler/xla/service/slow_operation_alarm.cc:65] 
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[Compiling module jit_wealth_time_series_for_loop_jax] Very slow compile?  If you want to file a bug, run with envvar XLA_FLAGS=--=/tmp/foo and attach the results.
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which suggests jax isn't running as it should again.

• [ ] once quantecon gpu machine is up and running we should test the lectures and jax on the 3080 to benchmark and diagnose what is going on.