Update gitdb to 4.0.12

[pyup-bot]

This PR updates gitdb from 4.0.11 to 4.0.12.

Changelog

4.0.12

What's Changed
* Never add a vendored smmap directory to sys.path by EliahKagan in https://github.com/gitpython-developers/gitdb/pull/102
* Revise and update the readme by EliahKagan in https://github.com/gitpython-developers/gitdb/pull/103
* Set Dependabot submodule update cadence to weekly by EliahKagan in https://github.com/gitpython-developers/gitdb/pull/104
* Add missing asserts in test_base.py by Clavss in https://github.com/gitpython-developers/gitdb/pull/109
* Use contextlib.suppress instead of except: pass by blablatdinov in https://github.com/gitpython-developers/gitdb/pull/113
* Add support for Python 3.13 by edgarrmondragon in https://github.com/gitpython-developers/gitdb/pull/114
* Potential Race Condition Fix - OS Rename & Chmod - PermissionError by DEKHTIARJonathan in https://github.com/gitpython-developers/gitdb/pull/115
* Bump gitdb/ext/smmap from `256c5a2` to `04dd210` by dependabot in https://github.com/gitpython-developers/gitdb/pull/112
* Bump actions/setup-python from 4 to 5 by dependabot in https://github.com/gitpython-developers/gitdb/pull/111

New Contributors
* Clavss made their first contribution in https://github.com/gitpython-developers/gitdb/pull/109
* blablatdinov made their first contribution in https://github.com/gitpython-developers/gitdb/pull/113
* edgarrmondragon made their first contribution in https://github.com/gitpython-developers/gitdb/pull/114
* DEKHTIARJonathan made their first contribution in https://github.com/gitpython-developers/gitdb/pull/115

**Full Changelog**: https://github.com/gitpython-developers/gitdb/compare/4.0.11...4.0.12

Links

• PyPI: https://pypi.org/project/gitdb
• Changelog: https://data.safetycli.com/changelogs/gitdb/
• Repo: https://github.com/gitpython-developers/gitdb
• Docs: https://pythonhosted.org/gitdb/