Update VERSION3.md

Author: pjfanning

release-notes/VERSION3.md

@@ -1,5 +1,10 @@
 Check VERSION.md for jackson-module-scala 2.x release information. This file tracks jackson-module-scala 3.x.
 
+# 3.0.4
+
+There are no new fixes in this release; it serves to track the 3.0.4 release
+of the upstream Jackson projects.
+
 # 3.0.3
 
 ## Fixes