Updating ReadTheDocs pinned requirements

Author: turukawa

.readthedocs.yml

@@ -2,6 +2,7 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 # See https://github.com/earthobservations/wetterdienst for implementation
+# https://browniebroke.com/blog/specify-docs-dependency-groups-with-poetry-and-read-the-docs/ 
 
 # Required
 version: 2
@@ -13,8 +14,7 @@ build:
   tools:
     python: "3.9"
   jobs:
-    post_create_environment:
-      # https://browniebroke.com/blog/specify-docs-dependency-groups-with-poetry-and-read-the-docs/      
+    post_create_environment:     
       # Install poetry
       - pip install poetry
       # Tell poetry to not use a virtual environment

mkdocs.yml

@@ -81,8 +81,8 @@ markdown_extensions:
 - pymdownx.highlight
 - pymdownx.extra
 - pymdownx.emoji:
-    emoji_index: !!python/name:material.extensions.emoji.twemoji
-    emoji_generator: !!python/name:material.extensions.emoji.to_svg
+    emoji_index: !!python/name:materialx.emoji.twemoji
+    emoji_generator: !!python/name:materialx.emoji.to_svg
 - pymdownx.tabbed:
     alternate_style: true