docs: fixes url of link to Vue3 version (#2006)

Co-authored-by: Lachlan Miller <[email protected]>

Author: luckylooke

docs/.vuepress/theme/Layout.vue

@@ -9,7 +9,10 @@
           </p>
           <p>
             To read docs for Vue Test Utils for Vue 3,
-            <a href="https://test-utils.vuejs.org/" v-text="'click here'" />.
+            <a
+              href="https://test-utils.vuejs.org/"
+              v-text="'click here'"
+            />.
           </p>
         </div>
       </div>