Fix Assistant Value Prop screen

(cherry picked from commit 135f273ae37badc17ca99549331f16f2f90f332e)

Bug: b:328842727
Fixed: b:328842727
Test: manually tested as described in the bug.
Change-Id: I61e4563e575addbf0cad2a56d82721c4bfebf98c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5358189
Commit-Queue: Yuki Awano <yawano@google.com>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1271064}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367142
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Yuki Awano <yawano@google.com>
Commit-Queue: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/branch-heads/6312@{#550}
Cr-Branched-From: 6711dcdae48edaf98cbc6964f90fac85b7d9986e-refs/heads/main@{#1262506}

diff --git a/chrome/browser/resources/chromeos/assistant_optin/assistant_value_prop.js b/chrome/browser/resources/chromeos/assistant_optin/assistant_value_prop.js
index ccc2463..67975b5 100644
--- a/chrome/browser/resources/chromeos/assistant_optin/assistant_value_prop.js
+++ b/chrome/browser/resources/chromeos/assistant_optin/assistant_value_prop.js

@@ -534,10 +534,10 @@
    */
   showContentForStep_(step) {
     for (const subtitle of this.$['subtitle-container'].children) {
-      subtitle.hidden = subtitle.getAttribute('step') !== step;
+      subtitle.hidden = parseInt(subtitle.getAttribute('step')) !== step;
     }
     for (const zippy of this.$['consents-container'].children) {
-      zippy.hidden = zippy.getAttribute('step') !== step;
+      zippy.hidden = parseInt(zippy.getAttribute('step')) !== step;
     }
   }