Add opentopomap.org to Leaflet More Maps

I just checked and it offers beautiful topographic maps. I don't know if any of the other maps offers that?

It has worldwide coverage: https://opentopomap.org/#map=8/45.4389/-116.8066

Thanks for suggesting adding @andyanderso. I have checked it out, and it looks gorgeous, so I have created a MR which adds it.

berramou → closed merge request !8

Great, thanks @berramou! Perhaps I can get credit in this issue, as well as the other ones, where I contributed to solve the issue?

Thank you @ressa for your help, yes of course i give you credit sorry i din't pay attention that you are checked for credit.

No problem, thanks for the credit @berramou. It looks like only 📌 Remove Wikimedia Maps Fixed and 📌 [Meta] Release version 2.2 Active miss credits.

Thank you @ressa for your help done, i added credit in those two issues.