Add another permutation of `EmptyState`

ts/components/conversation/media-gallery/EmptyState.md

@@ -1,5 +1,11 @@
 ```js
-<div style={{position: 'relative', width: '100%', height: 300}}>
+<div style={{ position: "relative", width: "100%", height: 300 }}>
-  <EmptyState label="You have no attachments with media"/>
+    <EmptyState label="You have no attachments with media" />
+</div>
+```
+
+```js
+<div style={{ position: "relative", width: "100%", height: 500 }}>
+    <EmptyState label="You have no documents with media" />
 </div>
 ```