CI: fix environments (again)

Author: lucascolley

.github/workflows/ci.yml

@@ -59,7 +59,7 @@ jobs:
           environments: ${{ matrix.environment }}
 
       - name: Test package
-        run: pixi run test-ci
+        run: pixi run -e ${{ matrix.environment }} test-ci
 
       # - name: Upload coverage report
       #   uses: codecov/codecov-action@v4.5.0