typos in doc.org

[hj-orgmode-1]

https://www.orgmode.org/worg/sources/doc.org :

availables -> available ,  uesr -> user :

24c24
<      over availables options will open the custom interface, which
---
>      over available options will open the custom interface, which
27c27
< These are the main "internals" that the uesr may want to know about,
---
> These are the main "internals" that the user may want to know about,