README: Ring -> GNU Ring
README: Ring -> GNU Ring

Change-Id: I4c9a4c3fcd7e0e9c5a7701ca441cfa7ce39349cf
Reviewed-by: Stepan Salenikovich <bebb1f1b8bb7363930c4153df8cb235b803d485d@savoirfairelinux.com>

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc