Fix deprecation warning when running with latest hugo version 0.156.0

Author: deining

layouts/_partials/navbar-lang-selector.html

@@ -14,22 +14,24 @@
   {{ end -}}
 
   <ul class="dropdown-menu">
-    {{ range $.Site.Languages -}}
-      {{ $translatedPages := where $allPages "Language.Lang" .Lang -}}
-      {{ $translated := "" -}}
-      {{ if gt (len $translatedPages) 0 -}}
-        {{ $translated = index $translatedPages 0 -}}
-      {{- end -}}
-      {{ $isActive := eq $.Site.Language.Lang .Lang -}}
-      <li>
-        {{- if $isActive -}}
-          <span class="dropdown-item active">{{ .LanguageName }}</span>
-        {{- else if $translated -}}
-          <a class="dropdown-item" href="{{ $translated.RelPermalink }}">{{ .LanguageName }}</a>
-        {{- else -}}
-          <span class="dropdown-item disabled">{{ .LanguageName }}</span>
+    {{ with .Rotate "language" }}
+      {{ range . -}}
+        {{ $translatedPages := where $allPages "Language.Lang" .Lang -}}
+        {{ $translated := "" -}}
+        {{ if gt (len $translatedPages) 0 -}}
+          {{ $translated = index $translatedPages 0 -}}
         {{- end -}}
-      </li>
+        {{ $isActive := eq $.Site.Language.Lang .Lang -}}
+        <li>
+          {{- if $isActive -}}
+            <span class="dropdown-item active">{{ .Site.Language.LanguageName }}</span>
+          {{- else if $translated -}}
+            <a class="dropdown-item" href="{{ $translated.RelPermalink }}">{{ .Site.Language.LanguageName }}</a>
+          {{- else -}}
+            <span class="dropdown-item disabled">{{ .Site.Language.LanguageName }}</span>
+          {{- end -}}
+        </li>
+        {{ end -}}
       {{ end -}}
     </ul>
-</div>
+</div>