Added rel="noopener noreferrer" to external links (#2356)

Author: danhogan

src/v2/guide/team.md

@@ -29,7 +29,7 @@ order: 803
           <dd>
             <ul>
               <li v-for="repo in profile.reposOfficial">
-                <a :href="githubUrl('vuejs', repo)" target=_blank>{{ repo.name || repo }}</a>
+                <a :href="githubUrl('vuejs', repo)" target=_blank rel="noopener noreferrer">{{ repo.name || repo }}</a>
               </li>
             </ul>
           </dd>
@@ -39,7 +39,7 @@ order: 803
           <dd>
             <ul>
               <li v-for="repo in profile.reposPersonal">
-                <a :href="githubUrl(profile.github, repo)" target=_blank>{{ repo.name || repo }}</a>
+                <a :href="githubUrl(profile.github, repo)" target=_blank rel="noopener noreferrer">{{ repo.name || repo }}</a>
               </li>
             </ul>
           </dd>