style: fix some style issued

src/main/resources/templates/configs/tokens.html

@@ -32,7 +32,7 @@
         <div class="token-form">
             <form th:hx-post="@{/configs/tokens}" hx-target="#tokens">
                 <input placeholder="Token-Name" name="name" required />
-                <button>Token Erstellen</button>
+                <button class="btn">Token Erstellen</button>
             </form>
         </div>
     </div>