add const to hpp file

Signed-off-by: Amruth Sandhupatla <[email protected]>

ttnn/cpp/ttnn/operations/matmul/device/matmul_op.hpp

@@ -216,7 +216,7 @@ Tensor matmul(
     const std::optional<const Tensor> bias = std::nullopt,
     const struct Matmul &parameters = Matmul{},
     const uint8_t queue_id = 0,
-    std::optional<Tensor> optional_output_tensor = std::nullopt);
+    const std::optional<Tensor> optional_output_tensor = std::nullopt);
 }  // namespace matmul
 
 }  // namespace operations