Update dependency mkdocs-material to v9.5.9

requirements-docs.txt

@@ -7,7 +7,7 @@ setuptools==68.2.2
 
 markdown-include==0.8.1
 mkdocs==1.5.3
-mkdocs-material==9.5.8
+mkdocs-material==9.5.9
 mkdocs-minify-plugin==0.7.2
 mkdocs-redirects==1.2.1
 mkdocstrings[python]==0.24.0