fix header consistency of contributing page
fix header consistency of contributing page
Varying-Vagrant-Vagrants/VVV,speartail/VVV,saucal/VVV,trepmal/varying-vagrant-vagrants,speartail/VVV,Varying-Vagrant-Vagrants/VVV,Varying-Vagrant-Vagrants/VVV,saucal/VVV,trepmal/varying-vagrant-vagrants,saucal/VVV