Update dependency mkdocs-material to v9.5.31

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| pypi       | mkdocs-material | 9.5.18 | 9.5.31 |


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

docs/requirements.txt

@@ -1,7 +1,7 @@
 mkdocs==1.5.3
 mike==2.1.2
 markdown==3.6
-mkdocs-material==9.5.18
+mkdocs-material==9.5.31
 
 # Markdown extensions
 Pygments==2.18.0