⬆️ Updates pymdown-extensions to v10 [SECURITY]

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/requirements_frozen.txt

@@ -7,7 +7,7 @@ Markdown==3.3.6
 markdown-checklist==0.4.3
 fontawesome-markdown==0.2.6
 markdown-include==0.6.0
-pymdown-extensions==9.4
+pymdown-extensions==10.16.1
 python-markdown-math==0.8
 mkdocs-literate-nav==0.4.1
 mkdocs-material-extensions==1.0.3