update jax install

Author: HumphreyYang

lectures/mccall_correlated.md

@@ -28,15 +28,7 @@ In addition to what's in Anaconda, this lecture will need the following librarie
 ```{code-cell} ipython
 :tags: [hide-output]
 
-!pip install quantecon
-```
-
-We also need to install JAX to run this lecture
-
-```{code-cell} ipython3
-:tags: [skip-execution]
-
-!pip install -U jax
+!pip install quantecon jax
 ```