refactor(app): name the feedback label helper refLabel

The reference parser uses issueRef as a reference kind.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/human_output.go

@@ -162,8 +162,8 @@ func (a *application) printURL(cmd *cobra.Command, url string) error {
 	return err
 }
 
-// issueRef names an issue or pull request in feedback: "alice/x#5 (Fix login)".
-func issueRef(repo string, number int64, title string) string {
+// refLabel names an issue or pull request in feedback: "alice/x#5 (Fix login)".
+func refLabel(repo string, number int64, title string) string {
 	return fmt.Sprintf("%s#%d (%s)", repo, number, title)
 }