update a small feature in __getitem__ for openvino backend

Author: Mohamed-Ashraf273

keras/src/backend/openvino/core.py

@@ -341,8 +341,13 @@ def count_unsqueeze_before(dim):
                 raise ValueError(
                     "OpenVINO backend does not support boolean indexing"
                 )
-            elif isinstance(index, (int, np.integer)):
-                if isinstance(index, np.integer):
+            elif isinstance(index, (int, np.integer, np.ndarray)):
+                if isinstance(index, (np.ndarray, np.integer)):
+                    if isinstance(index, np.ndarray):
+                        assert len(index.shape) == 0, (
+                            "OpenVINO backend does not "
+                            "support multi-dimensional indexing"
+                        )
                     index = int(index)
                 actual_dim = dim - count_unsqueeze_before(dim)
                 if not (0 <= actual_dim < rank):