plugin/auto: update some comments typos
plugin/auto: update some comments typos

Just happen to see these. Fix them.

chrisohaver/coredns,coredns/coredns,ii/coredns,ii/coredns,yongtang/coredns,miekg/coredns,johnbelamaric/coredns,jremond/coredns,miekg/coredns,johnbelamaric/coredns,jremond/coredns