Bump Koral version.

Change-Id: I8d1694d1938f77a4bf447b91ca818102c3d821b9
diff --git a/Changes b/Changes
index 910a9d0..44f8926 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,5 @@
+0.38.1 2021-12-17
+
 0.38 2021-12-10
     - [security] Updated log4j due to CVE-2021-44228 (diewald)
     - [bugfix] Updated dependencies following dependabot