[website-redesign] Change some copywriting after SEO agency feedback (#16681)

* Change h1 text content on homepage

* Change text below plans page on homepage

* Change some text copy on features overview page

GitOrigin-RevId: 7ace00041d59aa75cbc4abd79c4335fbbb089135

services/web/frontend/stylesheets/app/homepage.less

@@ -380,6 +380,7 @@
     font-size: 1.25rem;
     line-height: 1.4;
     margin-bottom: 0;
+    font-weight: 400;
 
     @media (max-width: @screen-sm-max) {
       font-size: 1.125rem;