Bump pylint from 2.11.1 to 2.12.2 in /requirements

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.11.1 to 2.12.2.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/main/ChangeLog)
- [Commits](pylint-dev/pylint@v2.11.1...v2.12.2)

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

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

Author: dependabot[bot]

requirements/dev-requirements.txt

@@ -20,7 +20,7 @@ pip_check_reqs==2.3.2
 pydocstyle==6.1.1  # Lint docstrings
 pyenchant==3.2.2  # Bindings for a spellchecking sytem
 pygithub==1.55
-pylint==2.11.1  # Lint
+pylint==2.12.2  # Lint
 pyroma==3.2  # Packaging best practices checker
 pytest-cov==3.0.0  # Measure code coverage
 pytest-envfiles==0.1.0  # Use files for environment variables for tests