Update pre-commit requirement from ~=2.11 to ~=2.12

Updates the requirements on [pre-commit](https://github.com/pre-commit/pre-commit) to permit the latest version.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v2.11.0...v2.12.0)

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

requirements-dev.txt

@@ -1,7 +1,7 @@
 -r requirements-test.txt
 black==20.08b1
 packaging==20.9
-pre-commit~=2.11
+pre-commit~=2.12
 PyGithub~=1.54
 pyupgrade~=2.11
 yamllint~=1.26