Keep re-dist. tests uv-free, simulating downstream

Author: DoctorJohn

.github/workflows/test-redistribute.yml

@@ -25,10 +25,10 @@ jobs:
           # Issue ref: https://github.com/actions/setup-python/issues/436
           # cache: "pip"
           # cache-dependency-path: pyproject.toml
-      - name: Install uv
-        uses: astral-sh/setup-uv@v7
+      - name: Install build dependencies
+        run: pip install build
       - name: Build source distribution
-        run: uv build --sdist
+        run: python -m build --sdist
       - name: Decompress source distribution
         run: |
           cd dist