release: Bump release to 1.14.3-rc1

Bump release version to 1.14.3-rc1

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/VERSION b/VERSION
index 71197cc..7cd0718 100644
--- a/VERSION
+++ b/VERSION
@@ -1,5 +1,5 @@
 VERSION_MAJOR = 1
 VERSION_MINOR = 14
-PATCHLEVEL = 2
+PATCHLEVEL = 3
 VERSION_TWEAK = 0
-EXTRAVERSION =
+EXTRAVERSION = rc1