CRITICAL - link corrected to show 16.04.1 fingerprint

"/16.04/" links to the most recent 16.04 version, in this case 16.04.5

Author: GraniteKeep

_docs/setup/create-boot-usb.md

@@ -80,7 +80,7 @@ copy there.
         security analysis, see the design document.
 
         You can verify this is the official Ubuntu fingerprint
-        [here](http://releases.ubuntu.com/16.04/SHA256SUMS),
+        [here](http://releases.ubuntu.com/16.04.1/SHA256SUMS),
         or follow Ubuntu's full verification process using this guide.
 
 6. Create the SETUP 1 BOOT USB.