update pre-commit and small typo (caught by codespell)

.pre-commit-config.yaml

@@ -14,6 +14,13 @@ repos:
         language: system
         files: "(.py$)|(.*.ipynb$)"
 
+      - id: mypy
+        name: mypy
+        language: python
+        entry: mypy --install-types --non-interactive
+        files: ^numpyro/
+
+
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.6.0
     hooks:

numpyro/distributions/continuous.py

@@ -600,7 +600,7 @@ def __init__(
             transition_matrix.ndim == 2
         ), "`transition_matrix` argument should be a square matrix"
         self.transition_matrix = transition_matrix
-        # Expand the covariance/presicion/scale matrices to the right number of steps.
+        # Expand the covariance/precision/scale matrices to the right number of steps.
         args = {
             "covariance_matrix": covariance_matrix,
             "precision_matrix": precision_matrix,