Update flake8-bugbear requirement from <23.6 to <23.7

Updates the requirements on [flake8-bugbear](https://github.com/PyCQA/flake8-bugbear) to permit the latest version.
- [Release notes](https://github.com/PyCQA/flake8-bugbear/releases)
- [Commits](PyCQA/flake8-bugbear@16.4.1...23.6.5)

---
updated-dependencies:
- dependency-name: flake8-bugbear
  dependency-type: direct:development
...

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

Author: dependabot[bot]

dev-requirements.txt

@@ -2,7 +2,7 @@ diff_cover < 7.6
 pylint < 2.18
 pydocstyle < 6.4
 flake8 > 4
-flake8-bugbear < 23.6
+flake8-bugbear < 23.7
 tox < 3.29  # until tox-pyenv is updated for tox 4.x
 tox-pyenv < 1.2
 isort < 5.13