fix: readthedocs install

Author: gadomski

.readthedocs.yaml

@@ -14,7 +14,7 @@ build:
     - asdf plugin add uv
     - asdf install uv latest
     - asdf global uv latest
-    - uv sync uv --all-extras --no-dev
+    - uv sync --all-extras --no-dev
     - uv sync --package pystac-docs --inexact # we need inexact to keep the top-level sync packages 
     - uv run sphinx-build -T -b html -d docs/_build/doctrees -D language=en docs $READTHEDOCS_OUTPUT/html