test($theme-default): update snapshots

packages/@vuepress/theme-default/__tests__/components/__snapshots__/DropdownLink.spec.js.snap

@@ -4,9 +4,13 @@ exports[`DropdownLink renders dropdown link. 1`] = `
 <div class="dropdown-wrapper"><button type="button" aria-label="Learn More Select" class="dropdown-title"><span class="title">Learn More</span> <span class="arrow right"></span></button>
   <ul class="nav-dropdown" style="display: none;" name="dropdown">
     <li class="dropdown-item">
-      <!----> <a class="nav-link">Guide</a></li>
+      <!----> <a class="nav-link">
+        Guide
+      </a></li>
     <li class="dropdown-item">
-      <!----> <a class="nav-link">Config Reference</a></li>
+      <!----> <a class="nav-link">
+        Config Reference
+      </a></li>
   </ul>
 </div>
 `;

packages/@vuepress/theme-default/__tests__/components/__snapshots__/NavLink.spec.js.snap

@@ -6,4 +6,8 @@ exports[`NavLink renders nav link with external link 1`] = `
   <p class="component outbound-link">outbound-link</p></a>
 `;
 
-exports[`NavLink renders nav link with internal link 1`] = `<a class="nav-link">VuePress</a>`;
+exports[`NavLink renders nav link with internal link 1`] = `
+<a class="nav-link">
+  VuePress
+</a>
+`;