A11Y: add page title to account activation step (#23736)

app/assets/javascripts/discourse/app/routes/account-created.js

@@ -1,7 +1,12 @@
 import PreloadStore from "discourse/lib/preload-store";
-import Route from "@ember/routing/route";
+import DiscourseRoute from "discourse/routes/discourse";
+import I18n from "I18n";
+
+export default DiscourseRoute.extend({
+  titleToken() {
+    return I18n.t("create_account.activation_title");
+  },
 
-export default Route.extend({
   setupController(controller) {
     controller.set("accountCreated", PreloadStore.get("accountCreated"));
   },

config/locales/client.en.yml

@@ -2113,6 +2113,7 @@ en:
       title: "Create your account"
       failed: "Something went wrong, perhaps this email is already registered, try the forgot password link"
       associate: "Already have an account? <a href='%{associate_link}'>Log In</a> to link your %{provider} account."
+      activation_title: "Activate your account"
 
     forgot_password:
       title: "Password Reset"