Update README.md

Author: mathiasrw

test/README.md

@@ -1,3 +1,3 @@
-test scripts duplicated from https://github.com/oriherrnstadt/SQLlogictest/tree/master/test
+test scripts duplicated from https://github.com/gregrahn/sqllogictest/tree/master/test
 
-Fileformat described here: http://www.sqlite.org/sqllogictest/doc/trunk/about.wiki
+Fileformat described here: http://www.sqlite.org/sqllogictest/doc/trunk/about.wiki