chore(deps): update dependency pymdown-extensions to v9.3

Author: renovate-bot

requirements.txt

@@ -16,7 +16,7 @@ mkdocs-material==8.2.5
 mkdocs-material-extensions==1.0.3
 packaging==21.3
 Pygments==2.11.2
-pymdown-extensions==9.2
+pymdown-extensions==9.3
 pyparsing==3.0.7
 python-dateutil==2.8.2
 pytz==2021.3