fix(helm): fix golint warning due to RepoFile type name

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

pkg/repo/repo.go

@@ -31,7 +31,8 @@ import (
 var ErrRepoOutOfDate = errors.New("repository file is out of date")
 
 // RepoFile represents the repositories.yaml file in $HELM_HOME
-type RepoFile struct {
+// TODO: change type name to File in Helm 3 to resolve linter warning
+type RepoFile struct { // nolint
 	APIVersion   string    `json:"apiVersion"`
 	Generated    time.Time `json:"generated"`
 	Repositories []*Entry  `json:"repositories"`