Branchprotector: improve document by explicitly mark repo protected
Branchprotector: improve document by explicitly mark repo protected

The general rule for branchprotection setting says use parent value if child value is null, in current case it would inherit 'protect: false' from org, mark it protected to make it more explicit

michelle192837/test-infra,monopole/test-infra,fejta/test-infra,dims/test-infra,cblecker/test-infra,cjwagner/test-infra,dims/test-infra,dims/test-infra,cblecker/test-infra,michelle192837/test-infra,michelle192837/test-infra,monopole/test-infra,kubernetes/test-infra,BenTheElder/test-infra,fejta/test-infra,pwittrock/test-infra,fejta/test-infra,cblecker/test-infra,monopole/test-infra,kubernetes/test-infra,cblecker/test-infra,BenTheElder/test-infra,jessfraz/test-infra,monopole/test-infra,cjwagner/test-infra,BenTheElder/test-infra,michelle192837/test-infra,cjwagner/test-infra,cjwagner/test-infra,jessfraz/test-infra,jessfraz/test-infra,michelle192837/test-infra,pwittrock/test-infra,fejta/test-infra,cblecker/test-infra,pwittrock/test-infra,michelle192837/test-infra,fejta/test-infra,kubernetes/test-infra,pwittrock/test-infra,jessfraz/test-infra,BenTheElder/test-infra,dims/test-infra,jessfraz/test-infra,cjwagner/test-infra,kubernetes/test-infra,fejta/test-infra,monopole/test-infra,BenTheElder/test-infra,kubernetes/test-infra,dims/test-infra,pwittrock/test-infra,monopole/test-infra,cblecker/test-infra,kubernetes/test-infra,BenTheElder/test-infra,cjwagner/test-infra,dims/test-infra,jessfraz/test-infra