message: docs: Update README with serialization instructions
diff: @@ -23,6 +23,8 @@ compile_settings.op_precision = torch::kFloat;
  auto trt_mod = trtorch::CompileGraph(ts_mod, compile_settings);
  // Run like normal
  auto results = trt_mod.forward({in_tensor});
  +// Save module for later
  +trt_mod.save("trt_torchscript_module.ts");
  ...
  ```
  @@ -46,6 +48,7 @@ trt_ts_module = trtorch.compile(torch_script_module, compile_settings)
  input_data = input_data.half()
  result = trt_ts_module(input_data)
  +torch.jit.save(trt_ts_module, "trt_torchscript_module.ts")
  ```
  > Notes on running in lower precisions:
  