VERSION: bump for 21.3.0-rc5

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
diff --git a/VERSION b/VERSION
index 04fcf85..9286353 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-21.3.0-rc4
+21.3.0-rc5