Fix `awaiting pr` label link
Fix `awaiting pr` label link

The previous link was giving back no results.
It seems like the label was changed.
sjakobi/stack,AndrewRademacher/stack,meiersi-11ce/stack,mrkkrp/stack,achernyak/stack,deech/stack,mrkkrp/stack,phadej/stack,narrative/stack,luigy/stack,keent/stack,AndrewRademacher/stack,supermario/stack,rvion/stack,fizruk/stack,achernyak/stack,meiersi-11ce/stack,rubik/stack,anton-dessiatov/stack,Blaisorblade/stack,anton-dessiatov/stack,deech/stack,AndreasPK/stack,mathhun/stack,juhp/stack,harendra-kumar/stack,lukexi/stack,MichielDerhaeg/stack,narrative/stack,Fuuzetsu/stack,MichielDerhaeg/stack,mathhun/stack,phadej/stack,Fuuzetsu/stack,fizruk/stack,AndreasPK/stack,lukexi/stack,harendra-kumar/stack,luigy/stack,vigoo/stack,vigoo/stack,Blaisorblade/stack,supermario/stack,Heather/stack,rvion/stack,sjakobi/stack,martin-kolinek/stack,Heather/stack,rubik/stack,keent/stack,juhp/stack,martin-kolinek/stack