fix tag workflow

Author: kleinhenz

.github/workflows/tag.yml

@@ -5,6 +5,21 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+'
 
 jobs:
+  build:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v4"
+        with:
+          fetch-depth: 0
+      - uses: "actions/setup-python@v5"
+        with:
+          python-version: "3.x"
+      - run: "python -m pip install --upgrade build"
+      - run: "python -m build ."
+      - uses: "actions/upload-artifact@v4"
+        with:
+          name: "python-package-distributions"
+          path: "dist/"
   pypi:
     environment:
       name: "test.pypi.org"