Update VERSION3.md

Author: pjfanning

release-notes/VERSION3.md

@@ -1,6 +1,6 @@
 Check VERSION.md for jackson-module-scala 2.x release information. This file tracks jackson-module-scala 3.x.
 
-# 3.0.0 (release not yet scheduled)
+# 3.0.0-rc2
 
 This patch release tracks Jackson 3.0.0. The 3.0 series has full support for Scala 2.11, 2.12, 2.13 and 3. There are many changes in related jackson libraries
 that affect all jackson users. jackson-module-scala changes are less significant. The most notable change is the addition of ScalaModule builder.