Update version for v8.2.0-rc2 release

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/VERSION b/VERSION
index f4c0d54..2cb1d85 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.1.91
+8.1.92