[mlir][tosa] Align AddOp examples to spec

* simple example variable name alignment

Signed-off-by: Jerry Ge <[email protected]>
Change-Id: Iec71c6b047f4ec2fdad55dc2b6123efb307f4c4d

Author: Jerry-Ge

mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td

@@ -611,10 +611,10 @@ def Tosa_AddOp : Tosa_ElementwiseOp<"add", [
 
     ```mlir
     // Elementwise addition.
-    %out = tosa.add %in1, %in2 : tensor<12x6xf32>, tensor<12x6xf32> -> tensor<12x6xf32>
+    %out = tosa.add %input1, %input2 : tensor<12x6xf32>, tensor<12x6xf32> -> tensor<12x6xf32>
 
     // Elementwise addition with broadcasting.
-    %out = tosa.add %in1, %in2 : tensor<12x6xsi32>, tensor<1x1xsi32> -> tensor<12x6xsi32>
+    %out = tosa.add %input1, %input2 : tensor<12x6xsi32>, tensor<1x1xsi32> -> tensor<12x6xsi32>
     ```
   }];