[pre-commit.ci] pre-commit autoupdate (#900)

updates:
- [github.com/psf/black: 23.3.0 → 23.7.0](psf/black@23.3.0...23.7.0)
- [github.com/asottile/blacken-docs: 1.14.0 → 1.15.0](adamchainz/blacken-docs@1.14.0...1.15.0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -1,12 +1,12 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: 23.3.0
+    rev: 23.7.0
     hooks:
       - id: black
         args: ["--target-version=py37"]
 
   - repo: https://github.com/asottile/blacken-docs
-    rev: 1.14.0
+    rev: 1.15.0
     hooks:
       - id: blacken-docs
         args: ["--target-version=py37"]