Update GPL-3.0.yaml

Fix link to copyleft.org

Author: copiesofcopies

src/GPL-3.0.yaml

@@ -4,7 +4,7 @@
   licenseId:
   - GPL-3.0-only
   - GPL-3.0-or-later
-  notes: "GPL-3.0 provides the option to use either that version of the license only or to make it available under any later version of that license. This is denoted in the standard license header and by using GPL-3.0-only or GPL-3.0-or-later. For a comparison of GPL-3.0 to GPL-2.0, see http://copyleft.org/guide/comprehensive-gpl-guidech10.html#x13-610009[Copyleft Guide: Understanding GPLv3 As An Upgraded GPLv2]"
+  notes: "GPL-3.0 provides the option to use either that version of the license only or to make it available under any later version of that license. This is denoted in the standard license header and by using GPL-3.0-only or GPL-3.0-or-later. For a comparison of GPL-3.0 to GPL-2.0, see http://copyleft.org/guide/comprehensive-gpl-guidech10.html#x13-660009.1[Copyleft Guide: Understanding GPLv3 As An Upgraded GPLv2]"
 
   terms:
   - type: condition