add 'lr11xx' topic

[lyusupov]

current repo topics list (limited to 20 entries) does not contain lr1110 or lr1121 ones.

Suggestion is to sacrifice one of rarely used topics in favor of more recent lr11xx tag.

[jgromes]

That's a good point, searching for LR1110 on GitHub does not actually show up RadioLib. I added lr1110 and lr1120. The library/package files like library.json already have it since those are not limited by the number of tags.