Bump sphinxcontrib-mermaid from 0.6.3 to 0.9.2 (#168)

Bumps [sphinxcontrib-mermaid](https://github.com/mgaitan/sphinxcontrib-mermaid) from 0.6.3 to 0.9.2.
- [Changelog](https://github.com/mgaitan/sphinxcontrib-mermaid/blob/master/CHANGELOG.rst)
- [Commits](mgaitan/sphinxcontrib-mermaid@0.6.3...0.9.2)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -3,7 +3,7 @@
 
 sphinx==4.0.2
 sphinx_autodoc_typehints==1.24.0
-sphinxcontrib-mermaid==0.6.3
+sphinxcontrib-mermaid==0.9.2
 sphinx-typlog-theme==0.8.0
 tomlkit==0.12.1
 m2r2==0.3.3.post2