Bump tomlkit from 0.5.8 to 0.5.11 in /docs

Bumps [tomlkit](https://github.com/sdispater/tomlkit) from 0.5.8 to 0.5.11.
- [Release notes](https://github.com/sdispater/tomlkit/releases)
- [Changelog](https://github.com/sdispater/tomlkit/blob/master/CHANGELOG.md)
- [Commits](python-poetry/tomlkit@0.5.8...0.5.11)

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

docs/requirements.txt

@@ -7,7 +7,7 @@ sphinxcontrib-mermaid==0.3.1
 recommonmark==0.6.0
 m2r==0.2.1
 added-value==0.14.2
-tomlkit==0.5.8
+tomlkit==0.5.11
 docutils==0.14
 
 # Dependencies of our linter that should be documented,