change debian revision for upload to Debian

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/debian/changelog b/debian/changelog
index 2a86742..4e93685 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-rt-tests (0.39-1~~ukl1) UNRELEASED; urgency=low
+rt-tests (0.39-1) unstable; urgency=low
 
   * Initial release. (Closes: #521895)