NOTICE: Add blank lines around the address

To make it more stand out and align with the acknowledgment formatting.

Author: sschuberth

NOTICE

@@ -40,8 +40,10 @@ or https://github.com/nexB/scancode-thirdparty-src/
 
 You may also contact us to request the source code by email at [email protected] or
 by postal mail at:
+
   nexB Inc., ScanCode open source code request
   735 Industrial Road, Suite #101, 94070 San Carlos, CA, USA
+
 Please indicate in your communication the ScanCode version for which you are
 requesting source code.