Replace numpy.concat() -> numpy.concatenate()

numpy.concat() is an alias to numpy.concatenate(), available in
numpy >= 2.0. To support older numpys, we should use concatenate()
instead.

spinedb_api/parameter_value.py

@@ -1062,7 +1062,7 @@ def merge(self, other):
             # Avoid sorting when indices are arbitrary strings
             existing = set(self.indexes)
             additional = [x for x in other.indexes if x not in existing]
-            new_indexes = np.concat((additional, self.indexes))
+            new_indexes = np.concatenate((additional, self.indexes))
 
         def _merge(value, other):
             return other if value is None else merge_parsed(value, other)