Update version to 13.0.0-rc2

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/VERSION b/VERSION
index 0ee82ac..4bb1cb3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-13.0.0-rc1
+13.0.0-rc2