chore: Use uv for build steps and update TestPyPI repository URL.

Author: NullPointerDepressiveDisorder

.github/workflows/release.yml

@@ -18,10 +18,10 @@ jobs:
                   python-version: "3.13"
 
             - name: Install build tools
-              run: pip install build
+              run: uv pip install build
 
             - name: Build sdist and wheel
-              run: python -m build
+              run: uv build
 
             - name: Store the distribution packages
               uses: actions/upload-artifact@v6
@@ -48,7 +48,7 @@ jobs:
             - name: Publish to TestPyPI
               uses: pypa/gh-action-pypi-publish@release/v1
               with:
-                  repository-url: https://test.pypi.org
+                  repository-url: https://test.pypi.org/legacy/
 
     publish-to-pypi:
         name: Publish to PyPI