Livechat plugin v6.0.0+ do not require prosody_ynh anymore

[tituspijean]

Direct feedback from @JohnXLivingston during the JDLL:

Since its version v6.0.0, the chat plugin relies on Prosody AppImage, which means we don't need prosody_ynh anymore, thus not disabling Metronome.

This is valid for all architectures except ARM, he's working on it.

[JohnXLivingston]

Thanks @tituspijean :)

[JohnXLivingston]

I'm going to release the v7.0.0 for the chat plugin. It should be compatible with ARM64. If someone using such CPU can confirm that it works after:

• updating the plugin to v7.0.0
• disabling the settings «use system prosody» in the plugin settings

The v7.0.0 should be available in a few hours.