Bump yamllint from 1.26.1 to 1.26.2

Bumps [yamllint](https://github.com/adrienverge/yamllint) from 1.26.1 to 1.26.2.
- [Release notes](https://github.com/adrienverge/yamllint/releases)
- [Changelog](https://github.com/adrienverge/yamllint/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/adrienverge/yamllint/compare/v1.26.1...v1.26.2)

---
updated-dependencies:
- dependency-name: yamllint
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -16,4 +16,4 @@ sphinxcontrib-programoutput==0.17
 sphinx-autobuild==2021.3.14
 linuxdoc==20210324
 aiounittest==1.4.0
-yamllint==1.26.1
+yamllint==1.26.2