CI: Fix package build by using hatch instead of uv

Using `uv build` creates a wheel package without any code.

Author: amotl

.github/workflows/release.yml

@@ -19,9 +19,16 @@ jobs:
 
       - name: Set up uv
         uses: astral-sh/setup-uv@v7
+        with:
+          activate-environment: true
+          enable-cache: true
+          python-version: "3.14"
+
+      - name: Set up Hatch
+        run: uv pip install hatch
 
       - name: Build package
-        run: uv build
+        run: hatch build
 
       - name: Publish package to PyPI
         if: startsWith(github.event.ref, 'refs/tags')