chore(internal): update mypy (#425)

Author: stainless-app[bot]

requirements-dev.lock

@@ -49,7 +49,7 @@ markdown-it-py==3.0.0
     # via rich
 mdurl==0.1.2
     # via markdown-it-py
-mypy==1.7.1
+mypy==1.10.1
 mypy-extensions==1.0.0
     # via mypy
 nodeenv==1.8.0