message: Fix hello world example
  Increase arena size.
diff: @@ -52,7 +52,7 @@ TF_LITE_MICRO_TEST(LoadModelAndPerformInference) {
  // you can retrieve this value by invoking interpreter.arena_used_bytes().
  const int model_arena_size = 754;
  /* Extra headroom for model + alignment + future interpreter changes */
  - const int extra_arena_size = 554 + 16 + 100;
  + const int extra_arena_size = 554 + 16 + 164;
  const int tensor_arena_size = model_arena_size + extra_arena_size;
  uint8_t tensor_arena[tensor_arena_size];
  