add missing translation string

src/locale/properties/side-bar/side-bar.en.properties

@@ -4,6 +4,7 @@ side-bar.termOfUse=ORCID terms of use
 side-bar.youMayOnly=you may only add email addresses that you have control over. Each time you add an email address we will send you an email asking you to verify it.
 side-bar.primaryEmail=Primary email address
 side-bar.verifiedEmail=Verified email address
+side-bar.verifiedEmailAddresses=Verified email addresses
 side-bar.emailCanNotBeDuplicated=Email can not be duplicated
 side-bar.noOtherEmails=You haven’t added any other email addresses yet.
 side-bar.invalidEmailFormat=Invalid email format