added missing filters translation

src/app/vault/groupings.component.html

@@ -1,6 +1,6 @@
 <div class="card vault-filters">
     <div class="card-header">
-        Filters
+        {{'filters' | i18n}}
     </div>
     <div class="card-body">
         <input type="search" placeholder="{{searchPlaceholder || ('searchVault' | i18n)}}" id="search" class="form-control" [(ngModel)]="searchText"

src/locales/en/messages.json

@@ -2347,5 +2347,8 @@
   },
   "privacyPolicy": {
     "message": "Privacy Policy"
+  },
+  "filters": {
+    "message": "Filters"
   }
 }