Fix closing HTML tag in navs docs (#36466)

Author: julien-deramond

site/content/docs/4.6/components/navs.md

@@ -477,7 +477,7 @@ And with vertical pills.
   <div class="col-3">
     <div class="nav flex-column nav-pills" id="v-pills-tab" role="tablist" aria-orientation="vertical">
       <button class="nav-link active" id="v-pills-home-tab" data-toggle="pill" data-target="#v-pills-home" type="button" role="tab" aria-controls="v-pills-home" aria-selected="true">Home</button>
-      <button class="nav-link" id="v-pills-profile-tab" data-toggle="pill" data-target="#v-pills-profile" type="button" role="tab" aria-controls="v-pills-profile" aria-selected="false">Profile</buttona>
+      <button class="nav-link" id="v-pills-profile-tab" data-toggle="pill" data-target="#v-pills-profile" type="button" role="tab" aria-controls="v-pills-profile" aria-selected="false">Profile</button>
       <button class="nav-link" id="v-pills-messages-tab" data-toggle="pill" data-target="#v-pills-messages" type="button" role="tab" aria-controls="v-pills-messages" aria-selected="false">Messages</button>
       <button class="nav-link" id="v-pills-settings-tab" data-toggle="pill" data-target="#v-pills-settings" type="button" role="tab" aria-controls="v-pills-settings" aria-selected="false">Settings</button>
     </div>