Update dependency pymdown-extensions to v10.13 (#408)

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

Author: renovate[bot]

.github/mkdocs/requirements.txt

@@ -26,7 +26,7 @@ paginate==0.5.7
 pathspec==0.12.1
 platformdirs==4.3.6
 Pygments==2.18.0
-pymdown-extensions==10.12
+pymdown-extensions==10.13
 pyparsing==3.2.0
 python-dateutil==2.9.0.post0
 PyYAML==6.0.2