community/erlang: upgrade to 26.2.2 & do a minimal rebuild

Rebuilding only elixir (to be sure nothing breaks) and mongooseim (to update symlinks to erlang libs) this time since it appears this is just a patch release.

https://github.com/erlang/otp/releases/download/OTP-26.2.2/OTP-26.2.2.README

If anyone thinks of anything else needing a rebuild, please leave a comment here.