Link to gnu.org for GNU GPL license

Signed-off-by: Michal Čihař <michal@cihar.com>

Author: nijel

pmaweb/templates/license.html

@@ -7,7 +7,7 @@ <h2>phpMyAdmin License</h2>
 
 <p>
 phpMyAdmin is released under <a
-href="http://creativecommons.org/licenses/GPL/2.0/">GNU General
+href="https://www.gnu.org/licenses/gpl-2.0.html">GNU General
 Public License, version 2</a>.
 </p>
 
@@ -36,7 +36,7 @@ <h2>Website Generator License</h2>
 
 <p>
 Website generator is released under <a
-href="http://creativecommons.org/licenses/GPL/2.0/">GNU General
+href="https://www.gnu.org/licenses/gpl-2.0.html">GNU General
 Public License, version 2 or later</a>.
 </p>