Update black dependency version and pytest constraint

Author: henryiii

.pre-commit-config.yaml

@@ -42,7 +42,7 @@ repos:
     rev: 1.20.0
     hooks:
       - id: blacken-docs
-        additional_dependencies: [black==24.*]
+        additional_dependencies: [black==25.*]
 
   - repo: https://github.com/cheshirekow/cmake-format-precommit
     rev: v0.6.13
@@ -82,7 +82,7 @@ repos:
           - nox
           - orjson
           - packaging>=24.2
-          - pytest
+          - pytest<9  # pytest 9 requires Python 3.10+
           - pytest-subprocess
           - rich
           - setuptools-scm