LICENSE: Fix out copy-paste mistake

Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

LICENSE

 virt-test is released specifically under the GPLv2, and not any
 later version of the license, unless explicitly otherwise stated
 
-All files in the autotest project are covered by the GPLv2, unless
+All files in the virt-test project are covered by the GPLv2, unless
 explicitly otherwise stated.