more copyedits on staff unusual login email

config/locales/server.en.yml

@@ -3233,8 +3233,8 @@ en:
         If the above link is not clickable, try copying and pasting it into the address bar of your web browser.
 
     suspicious_login:
-      title: "Unusual Login Alert"
-      subject_template: "Unusual Login Alert"
+      title: "New Login Alert"
+      subject_template: "New Login Alert"
       text_body_template: |
         Hello,
 
@@ -3242,8 +3242,9 @@ en:
 
          - Location: %{location} (%{client_ip})
          - Browser: %{browser}
-         - Device: %{device}
-         - Operating System: %{os}
+         - Device: %{device} – %{os}
+
+        If this was you, great! There’s nothing else you need to do.
 
         If this was not you, please reset your password as soon as possible.