Use https://github.com/matrix-org/libera-chat for reporting libera.chat specific issues

[Half-Shot]

https://github.com/matrix-org/libera-chat is where we are now handling specific problems with the matrix.org deployment of the libera.chat. Other issues, including problems related to other deployments should still appear in this repository for the time being.

There are a few issue templates, but feel free to open an issue and we'll handle as appropriate.