Fix docs syntax highlighting in admonition code blocks (#10346)

Author: nopcoder

docs/mkdocs.yml

@@ -64,7 +64,6 @@ markdown_extensions:
   - attr_list
   - def_list
   - admonition
-  - codehilite
   - pymdownx.highlight:
       anchor_linenums: true
       line_spans: __span

docs/requirements-docs.txt

@@ -4,5 +4,5 @@ mkdocs-material==9.7.1
 mkdocs-redirects==1.2.2
 mkdocs==1.6.1
 git+https://github.com/treeverse/mkdocs-render-swagger-plugin.git#egg=mkdocs-render-swagger-plugin
-pymdown-extensions==10.20.1
+pymdown-extensions==10.21.2
 mkdocs-glightbox==0.5.2