Update update-copyright to version 0.3.

diff --git a/update-copyright b/update-copyright
index 1e0bb15fbf0be2d440e5d1dbbaa82562c9f918b0..5ab3ec3c6310088f9a94fbd9542c6a7a38fde1fe 160000 (submodule)
--- a/update-copyright
+++ b/update-copyright
@@ -1 +1 @@
-Subproject commit 1e0bb15fbf0be2d440e5d1dbbaa82562c9f918b0
+Subproject commit 5ab3ec3c6310088f9a94fbd9542c6a7a38fde1fe