build(deps-dev): bump flit from 3.11.0 to 3.12.0

Bumps [flit](https://github.com/pypa/flit) from 3.11.0 to 3.12.0.
- [Changelog](https://github.com/pypa/flit/blob/main/doc/history.rst)
- [Commits](pypa/flit@3.11.0...3.12.0)

---
updated-dependencies:
- dependency-name: flit
  dependency-version: 3.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-dev.txt

@@ -1,3 +1,3 @@
 ruff==0.11.4
 pre-commit==4.2.0
-flit==3.11.0
+flit==3.12.0