Bump pymdown-extensions from 6.3 to 10.0 (#708)

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 6.3 to 10.0.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@6.3.0...10.0)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-type: direct:development
...

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

Author: dependabot[bot]

poetry.lock

@@ -41,7 +41,7 @@ pytest-benchmark = "^4.0.0"
 
 [tool.poetry.group.doc.dependencies]
 mkdocs = "^1.0"
-pymdown-extensions = "^6.0"
+pymdown-extensions = ">=6,<11"
 pygments = "^2.2"
 markdown-include = "^0.5.1"