org-babel-execute-src-block: No org-babel-execute function for ledger!

### What did you expect to happen?

In an org-mode file with the following contents:

```
#+BEGIN_SRC ledger :cmdline bal :results value
include file.ledger
#+END_SRC
```

I would use `C-c` to execute the block, and the results are displayed below it.

### What actually happened?

The following error is triggered when the code block is executed:

`org-babel-execute-src-block: No org-babel-execute function for ledger!`

### Describe your attempts to resolve the issue

I searched for how the lazy loading works in [the code](https://github.com/doomemacs/doomemacs/blob/master/modules/lang/org/config.el#L352). However, I could not find how an execute-function could be added.

### Steps to reproduce

1. Open emacs
2. Write the above into an `.org` file
3. Execute the block using `C-c`
4. Verify that the message `No org-babel-execute function for ledger!` is displayed.

### System Information

https://pastebin.com/PtNCU0qS