chore(deps): update dependency markdown to v3.8.1 [security]

Author: renovate[bot]

docs/requirements.txt

@@ -6,7 +6,7 @@ colorama==0.4.6
 ghp-import==2.1.0
 idna==3.10
 Jinja2==3.1.4
-Markdown==3.7
+Markdown==3.8.1
 MarkupSafe==3.0.2
 mergedeep==1.3.4
 mkdocs==1.6.1