chore(deps-dev): bump pywin32 from 311 to 312

Bumps [pywin32](https://github.com/mhammond/pywin32) from 311 to 312.
- [Release notes](https://github.com/mhammond/pywin32/releases)
- [Changelog](https://github.com/mhammond/pywin32/blob/main/CHANGES.md)
- [Commits](https://github.com/mhammond/pywin32/commits)

---
updated-dependencies:
- dependency-name: pywin32
  dependency-version: '312'
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -89,7 +89,7 @@ pytest-trio==0.8.0
 
 pytest-asyncio==1.3.0
 
-pywin32==311 ; platform_system == 'Windows'
+pywin32==312 ; platform_system == 'Windows'
 
 requests==2.33.0 ; python_version >= '3.7'