Fix docs workflow

Author: XkunW

.github/workflows/docs.yml

@@ -70,7 +70,7 @@ jobs:
         run: uv sync --all-extras --group docs --prerelease=allow
 
       - name: Build docs
-        run: uv run mkdocs build --prerelease=allow
+        run: uv run --frozen mkdocs build
 
       - name: Create .nojekyll file
         run: touch site/.nojekyll
@@ -104,7 +104,7 @@ jobs:
           python-version-file: ".python-version"
 
       - name: Install the project
-        run: uv sync --all-extras --group docs
+        run: uv sync --all-extras --group docs --frozen
 
       - name: Configure Git Credentials
         run: |