[site] fix mkdocs upgrade/deprecations

Author: ikrima

.vscode/settings.json

@@ -15,8 +15,8 @@
   "yaml.customTags": [
     "!ENV scalar",
     "!ENV sequence",
-    "tag:yaml.org,2002:python/name:materialx.emoji.to_svg",
-    "tag:yaml.org,2002:python/name:materialx.emoji.twemoji",
+    "tag:yaml.org,2002:python/name:material.extensions.emoji.to_svg",
+    "tag:yaml.org,2002:python/name:material.extensions.emoji.twemoji",
     "tag:yaml.org,2002:python/name:pymdownx.superfences.fence_code_format",
     "tag:yaml.org,2002:python/object/apply:pymdownx.arithmatex.arithmatex_inline_format mapping",
     "tag:yaml.org,2002:python/object/apply:pymdownx.arithmatex.arithmatex_fenced_format mapping",
@@ -62,4 +62,4 @@
     "titleBar.inactiveForeground": "#e7e7e799"
   },
   "peacock.color": "#ae4bd088",
-}
+}

mkdocs.yml

@@ -115,8 +115,8 @@ markdown_extensions:
   - pymdownx.critic
   - pymdownx.details
   - 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
   - pymdownx.magiclink:
       user:                    ikrima
       repo:                    gamedevguide