github/workflows/tox.yml: Update

Signed-off-by: Zack Cerza <zack@cerza.org>

Author: zmc

.github/workflows/tox.yml

@@ -27,7 +27,11 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
-      - name: Install tox
-        run: pip install tox
+      - name: Install pipx
+        run: pip install pipx
+      - name: Install uv
+        run: pipx install uv
+      - name: Run pipx ensurepath
+        run: pipx ensurepath
       - name: Run unit tests
-        run: tox -e py3
+        run: uv tox