Bump tomlkit from 0.7.2 to 0.12.1 (#173)

Bumps [tomlkit](https://github.com/sdispater/tomlkit) from 0.7.2 to 0.12.1.
- [Release notes](https://github.com/sdispater/tomlkit/releases)
- [Changelog](https://github.com/sdispater/tomlkit/blob/master/CHANGELOG.md)
- [Commits](python-poetry/tomlkit@0.7.2...0.12.1)

---
updated-dependencies:
- dependency-name: tomlkit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -5,7 +5,7 @@ sphinx==4.0.2
 sphinx_autodoc_typehints==1.24.0
 sphinxcontrib-mermaid==0.6.3
 sphinx-typlog-theme==0.8.0
-tomlkit==0.7.2
+tomlkit==0.12.1
 m2r2==0.2.7
 pygments==2.16.1