fix template test

Author: isoos

app/test/frontend/golden/pkg_index_page.html

@@ -443,7 +443,7 @@ <h3 class="packages-title pub-monochrome-icon-hoverable">
                     <span>core description</span>
                   </div>
                   <p class="packages-metadata">
-                    <span class="packages-metadata-block">v 2.14.0 • Dart SDK library</span>
+                    <span class="packages-metadata-block">Dart SDK library</span>
                     <span class="package-badge">Core library</span>
                     <span class="package-badge" title="Supports the null safety language feature.">Null safety</span>
                   </p>