Add link to /admin/roles in moderation interface when changing someone's role (#31791)

config/locales/en.yml

@@ -48,6 +48,7 @@ en:
         title: Change email for %{username}
       change_role:
         changed_msg: Role successfully changed!
+        edit_roles: Manage user roles
         label: Change role
         no_role: No role
         title: Change role for %{username}

config/locales/simple_form.en.yml

@@ -130,7 +130,7 @@ en:
         name: You can only change the casing of the letters, for example, to make it more readable
       user:
         chosen_languages: When checked, only posts in selected languages will be displayed in public timelines
-        role: The role controls which permissions the user has
+        role: The role controls which permissions the user has.
       user_role:
         color: Color to be used for the role throughout the UI, as RGB in hex format
         highlighted: This makes the role publicly visible