website: update package number text

We have quite a bit more than "hundreds of packages" nowadays:

find package -name \*.mk | wc -l
2285

So adjust the text to say 'several thousand' instead.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

docs/website/index.html

@@ -78,7 +78,7 @@
 	</div>
       </div>
 
-      <h4>Supports hundreds of packages</h4>
+      <h4>Supports several thousand packages</h4>
       <p>X.org stack, Gtk3, Qt 5, GStreamer, Webkit, Kodi, a large number of network-related and system-related utilities are supported.</p>
 
     </div><!--/col-lg-4 -->