Marking IDBLocaleAwareKeyRange as non-standard

See w3c/IndexedDB#38 for current state of discussions

files/en-us/web/api/idblocaleawarekeyrange/index.html

@@ -11,7 +11,7 @@
   - Reference
   - Storage
 ---
-<div>{{APIRef("IndexedDB")}}{{SeeCompatTable}}</div>
+<div>{{non-standard_header}}{{APIRef("IndexedDB")}}{{SeeCompatTable}}</div>
 
 <p>The <strong><code>IDBLocaleAwareKeyRange</code></strong> interface of the <a href="/en-US/docs/Web/API/IndexedDB_API">IndexedDB API</a> is a Firefox-specific version of {{domxref("IDBKeyRange")}} — it functions in exactly the same fashion, and has the same properties and methods, but it is intended for use with {{domxref("IDBIndex")}} objects when the original index had a <code>locale</code> value specified upon its creation (see <a href="/en-US/docs/Web/API/IDBObjectStore/createIndex#Parameters"><code>createIndex()</code>'s optionalParameters</a>) — that is, it has <a href="/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB#Locale-aware_sorting">locale aware sorting</a> enabled.</p>