Add link to upgrading information.
diff --git a/Upgrading-to-FreeRTOS-8.url b/Upgrading-to-FreeRTOS-8.url
new file mode 100644
index 0000000..5a78d15
--- /dev/null
+++ b/Upgrading-to-FreeRTOS-8.url
@@ -0,0 +1,5 @@
+[InternetShortcut]

+URL=http://www.freertos.org/upgrading-to-FreeRTOS-V8.html

+IDList=

+[{000214A0-0000-0000-C000-000000000046}]

+Prop3=19,2