Update black for blacken-docs

Author: peterjc

.pre-commit-config.yaml

@@ -48,7 +48,7 @@ repos:
     rev: 1.15.0
     hooks:
     -   id: blacken-docs
-        additional_dependencies: [black==23.3.0]
+        additional_dependencies: [black==23.7.0]
         exclude: ^(.github/|tests/test_cases/example_unicode.py)
 -   repo: https://github.com/rstcheck/rstcheck
     rev: v6.1.2