Updating ETCD version in release notes

Change-Id: I2e461cd481714761017da803001b5deead68483e
diff --git a/VERSION b/VERSION
index 969e36b..e8f6dcd 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.17
\ No newline at end of file
+2.8.18