Update charts for voltha-2.15 release

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I3b22a71f03965f800ba37e998535caac4da838b1
diff --git a/VERSION b/VERSION
index f280719..a08ffae 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.8.1
+3.8.2