[mlir][ArmSME][docs] Update example (NFC)

Author: MacDue

mlir/include/mlir/Dialect/ArmSME/Transforms/Passes.td

@@ -170,8 +170,8 @@ def OuterProductFusion
     Becomes:
 
     ```mlir
-    %a_packed = "llvm.intr.experimental.vector.interleave2"(%a0, %a1) : (vector<[4]xf16>, vector<[4]xf16>) -> vector<[8]xf16>
-    %b_packed = "llvm.intr.experimental.vector.interleave2"(%b0, %b1) : (vector<[4]xf16>, vector<[4]xf16>) -> vector<[8]xf16>
+    %a_packed = vector.interleave %a0, %a1 : vector<[4]xf16> -> vector<[8]xf16>
+    %b_packed = vector.interleave %b0, %b1 : vector<[4]xf16> -> vector<[8]xf16>
     %0 = arm_sme.fmopa_2way %a_packed, %b_packed : vector<[8]xf16>, vector<[8]xf16> into vector<[4]x[4]xf32>
     ```