Update dependency mkdocs-material to v9.4.8

Author: slack-oss-bot

.github/workflows/mkdocs-requirements.txt

@@ -7,7 +7,7 @@ Markdown==3.5.1
 MarkupSafe==2.1.3
 mkdocs==1.5.3
 mkdocs-macros-plugin==1.0.4
-mkdocs-material==9.4.7
+mkdocs-material==9.4.8
 mkdocs-material-extensions==1.3
 Pygments==2.16.1
 pymdown-extensions==10.3.1