MXSession: Fix `refreshHomeserverWellknown` method not reading Well-known from the homeserver domain.
MXSession: Fix `refreshHomeserverWellknown` method not reading Well-known from the homeserver domain.

matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk