cleanup: Use deepUnpack() intead of deep_unpack()

deep_unpack() is just a backwards compability alias for deepUnpack()[1].
The new name makes it more clear that this is not a C function, start to
use it.

[1] 13e662a29d

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2416>

js/ui/remoteSearch.js

@@ -287,7 +287,7 @@ var RemoteSearchProvider = class {
             for (let prop in metas[i]) {
                 // we can use the serialized icon variant directly
                 if (prop !== 'icon')
-                    metas[i][prop] = metas[i][prop].deep_unpack();
+                    metas[i][prop] = metas[i][prop].deepUnpack();
             }
 
             resultMetas.push({