DOCS Add OTP to updating.md
- I removed the Update section from the OTP install and added it to updating.md
- I also added a link to the updating.md from the OTP install page
- I added a Questions section to the OTP install, similar to the debian_based_en.md
- Restructured the updating.md a bit
I would very much also like to link to the changelog, but I don't know how to do it because I can't find the page in the docs?