Singer/Meltano: Invoke ngr using uv run

Author: amotl

.github/workflows/framework-singer-meltano.yml

@@ -65,10 +65,9 @@ jobs:
             framework/singer-meltano/requirements.txt
             framework/singer-meltano/requirements-dev.txt
 
-      - name: Install utilities
-        run: |
-          pip install -r requirements.txt
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
 
       - name: Validate framework/singer-meltano
         run: |
-          ngr test --accept-no-venv framework/singer-meltano
+          uv run --with=pueblo ngr test framework/singer-meltano