Update Release Notes suggestion chip to show 3 times.

This means on the first 3 launcher opens, the suggestion chip for whats
new will be seen. It previously only showed up once.

Bug: b/161755085
Change-Id: Ie9b475a57b1571873b98b1e80f329831eee71b67
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2351344Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Rachel Carpenter <carpenterr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797472}

chrome/browser/chromeos/release_notes/release_notes_storage.cc

@@ -27,7 +27,7 @@ int GetMilestone() {
   return version_info::GetVersion().components()[0];
 }
 
-constexpr int kTimesToShowSuggestionChip = 1;
+constexpr int kTimesToShowSuggestionChip = 3;
 
 }  // namespace