fix(html): duplicate id

Error: Duplicate ID navbarDropdown.
Source: Nu Html Checker

Author: Rotzbua

_includes/nav.html

@@ -24,12 +24,12 @@
             {% endfor %}
             <div class="nav-item ml-2 ml-sm-1 text-center">
               <div class="nav-item dropdown mb-0">
-                <button class="nav-link dropdown-toggle" id="navbarDropdown" aria-label="{% t generic.accessibility.lang-menu %}"
+                <button class="nav-link dropdown-toggle" id="navbarDropdown1" aria-label="{% t generic.accessibility.lang-menu %}"
                         data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                   <i class="fa fa-globe size-16 color-gray-900"></i><span
                      class="ml-1 size-16 color-gray-900 weight-600">{{ site.lang | upcase }}</span>
                 </button>
-                <div class="dropdown-menu" aria-labelledby="navbarDropdown">
+                <div class="dropdown-menu" aria-labelledby="navbarDropdown1">
                   {% include nav_languages.html %}
                 </div>
               </div>
@@ -40,12 +40,12 @@
         <div class="d-xl-none">
           <div class="nav-item text-center d-inline-block">
             <div class="nav-item dropdown">
-              <button class="nav-link dropdown-toggle" id="navbarDropdown" aria-label="{% t generic.accessibility.lang-menu %}"
+              <button class="nav-link dropdown-toggle" id="navbarDropdown2" aria-label="{% t generic.accessibility.lang-menu %}"
                       data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                 <i class="fa fa-globe size-16 color-gray-900"></i><span
                    class="ml-1 size-16 color-gray-900 weight-600">{{ site.lang | upcase }}</span>
               </button>
-            <div class="dropdown-menu" aria-labelledby="navbarDropdown">
+            <div class="dropdown-menu" aria-labelledby="navbarDropdown2">
               {% include nav_languages.html %}
             </div>
           </div>