chore(deps): update dependency mkdocs-material to v9.1.4

requirements.txt

@@ -87,7 +87,7 @@ mkdocs-git-revision-date-localized-plugin==1.2.0
     # via -r requirements.in
 mkdocs-glightbox==0.3.2
     # via -r requirements.in
-mkdocs-material==9.1.2
+mkdocs-material==9.1.4
     # via -r requirements.in
 mkdocs-material-extensions==1.1.1
     # via mkdocs-material