docs: spelling error in dep group installer

.readthedocs.yaml

@@ -17,7 +17,7 @@ build:
   jobs:
     post_install:
       - pip install dependency-groups
-      - pip-install-depdenency-groups docs
+      - pip-install-dependency-groups docs
 
 # Build documentation in the "docs/" directory with Sphinx
 mkdocs: