Update text on landing page explaining popular packages (#8676)

Author: szakarias

app/lib/frontend/templates/views/landing/page.dart

@@ -44,7 +44,7 @@ d.Node landingPageNode({
         ),
         title: 'Most popular packages',
         info: d
-            .text('Some of the most downloaded packages over the past 60 days'),
+            .text('Some of the most downloaded packages over the past 30 days'),
         content: miniListNode('most-popular', mostPopularPackages!),
         viewAllUrl: urls.listingByDownloadCounts(),
         viewAllEvent: 'landing-most-popular-view-all',

app/test/frontend/golden/landing_page.html

@@ -152,7 +152,7 @@ <h1 class="home-block-title">Flutter Favorites</h1>
         </div>
         <div class="home-block-content">
           <h1 class="home-block-title">Most popular packages</h1>
-          <p class="home-block-context-info">Some of the most downloaded packages over the past 60 days</p>
+          <p class="home-block-context-info">Some of the most downloaded packages over the past 30 days</p>
           <div class="mini-list">
             <div class="mini-list-item">
               <a class="mini-list-item-title" href="/packages/neon" data-ga-click-event="landing-most-popular-card-title">