Org babel exports results

Org-export-dispatch is not exporting the result of ob-async but this intermediate random number.

For example:

```
#+begin_src sh :results output replace :exports results :async
sleep 2s && echo "Hello World"
#+end_src
```
exports (as text output):
```
┌────
│ f26e93dae63d719bede4c9dd9b951858
└────
```
 It should export :wink: :
 ```
┌────
│ Hello World
└────
```