Skip failing test on scipy 1.16

Author: ricardoV94

tests/sparse/test_basic.py

@@ -1159,6 +1159,10 @@ def test_csm_grad(self):
                     structured=True,
                 )
 
+    @pytest.mark.skipif(
+        version.parse(sp.__version__) >= version.parse("1.16.0"),
+        reason="Scipy 1.16 introduced some changes that make this test fail",
+    )
     def test_csm_sparser(self):
         # Test support for gradients sparser than the input.