Update VERSION.md

Author: pjfanning

release-notes/VERSION.md

@@ -4,6 +4,11 @@ This patch release tracks Jackson 2.21. The 2.21 series has full support for
 Scala 2.11, 2.12, 2.13 and 3.3+. Java 8 is the minimum supported Java version.
 There are no new fixes in this release.
 
+# Version: 2.20.2
+
+There are no new fixes in this release; it serves to track the 2.20.2 release
+of the upstream Jackson projects.
+
 # Version: 2.20.1
 
 There are no new fixes in this release; it serves to track the 2.20.1 release