fix: Remove --frozen from uv sync to allow ReadTheDocs builds without lockfile

Author: jsonbailey

.readthedocs.yml

@@ -17,4 +17,4 @@ build:
     create_environment:
       - uv venv "${READTHEDOCS_VIRTUALENV_PATH}"
     install:
-      - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --frozen --project packages/sdk/server-ai --group docs
+      - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --project packages/sdk/server-ai --group docs