Bump version string for --draft release job

Change-Id: Iad6d6551ae3bce59487a2dde2d8516c804e8b2f1
diff --git a/VERSION b/VERSION
index 3210742..cd2bcda 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.8.28
+1.8.29