UX: Updates sign up CTA copy (#17612)

Before:

<img width="500" src="https://user-images.githubusercontent.com/33972521/180416547-300203d3-b092-4cb6-b65e-720b6a004b47.png">

After

<img width="500" src="https://user-images.githubusercontent.com/33972521/180415992-9f610bf8-ca67-4c69-a9dc-1409c4cb7f3f.png">

Internal topic
/t/-/70417

config/locales/client.en.yml

@@ -1878,11 +1878,11 @@ en:
 
     signup_cta:
       sign_up: "Sign Up"
-      hide_session: "Remind me tomorrow"
+      hide_session: "Maybe later"
       hide_forever: "no thanks"
       hidden_for_session: "OK, we'll ask you tomorrow. You can always use 'Log In' to create an account, too."
       intro: "Hello! Looks like you’re enjoying the discussion, but you haven’t signed up for an account yet."
-      value_prop: "When you create an account, we remember exactly what you’ve read, so you always come right back where you left off. You also get notifications, here and via email, whenever someone replies to you. And you can like posts to share the love. :heartpulse:"
+      value_prop: "Tired of scrolling through the same posts? when you create an account you’ll always come back to where you left off. With an account you can also be notified of new replies, save bookmarks, and use likes to thank others. We can all work together to make this community great. :heart:"
 
     summary:
       enabled_description: "You're viewing a summary of this topic: the most interesting posts as determined by the community."