Merge branch '2.17' into 2.18

Author: cowtowncoder

ion/pom.xml

@@ -39,7 +39,7 @@ tree model)
     <dependency>
       <groupId>com.amazon.ion</groupId>
       <artifactId>ion-java</artifactId>
-      <version>1.11.2</version>
+      <version>1.11.4</version>
     </dependency>
 
     <!-- Extends Jackson core, databind -->

release-notes/VERSION-2.x

@@ -19,6 +19,10 @@ Active maintainers:
 #484: (protobuf) Rework synchronization in `ProtobufMapper`
  (contributed by @pjfanning)
 
+2.17.1 (not yet released)
+
+#485 (ion): Upgrade `ion-java` to 1.11.4 (from 1.11.2)
+
 2.17.0 (12-Mar-2024)
 
 #251 (ion) Unable to deserialize Object with unknown `Timestamp` field