Fix nullable parameter warning

Author: DenisVieriu97

backends/apple/mps/runtime/operations/MPSGraphSequoiaOps.h

@@ -46,11 +46,11 @@
 @end
 
 @interface MPSGraph (MPSGraphQuantizationOps)
-- (MPSGraphTensor *)dequantizeTensor:(MPSGraphTensor *)tensor
-                         scaleTensor:(MPSGraphTensor *)scaleTensor
-                     zeroPointTensor:(MPSGraphTensor *)zeroPointTensor
-                            dataType:(MPSDataType)dataType
-                                name:(NSString *_Nullable)name;
+- (MPSGraphTensor *_Nonnull)dequantizeTensor:(MPSGraphTensor *_Nonnull)tensor
+                                 scaleTensor:(MPSGraphTensor *_Nonnull)scaleTensor
+                             zeroPointTensor:(MPSGraphTensor *_Nonnull)zeroPointTensor
+                                    dataType:(MPSDataType)dataType
+                                        name:(NSString *_Nullable)name;
 @end
 
 #endif