docs: Fix docs warning (#603)

* docs: fix docs

* pin

Author: tlambert03

mkdocs.yml

@@ -91,8 +91,8 @@ markdown_extensions:
           class: mermaid
           format: !!python/name:pymdownx.superfences.fence_code_format
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
 
 plugins:
   - search

pyproject.toml

@@ -112,7 +112,7 @@ dev = [
 ]
 docs = [
     "mkdocs",
-    "mkdocs-material ~=9.2",
+    "mkdocs-material ~=9.4",
     "mkdocstrings ==0.22.0",
     "mkdocstrings-python ==1.6.2",
     "mkdocs-gen-files",