Update ion-java dep to 1.11.1 (from 1.11.10) (#622)

Author: Shaurya0108

ion/pom.xml

@@ -38,7 +38,7 @@ tree model)
     <dependency>
       <groupId>com.amazon.ion</groupId>
       <artifactId>ion-java</artifactId>
-      <version>1.11.10</version>
+      <version>1.11.11</version>
     </dependency>
 
     <!-- will come from parent pom for later versions -->

release-notes/VERSION

@@ -19,6 +19,8 @@ implementations)
 #619: (avro, cbor, ion, smile) Add `isEnabled()` methods for format-specific features
   (like `CBORReadFeature` and `CBORWriteFeature`) to mappers
  (requested by Andy W)
+#623: (ion) Upgrade `ion-java` dep to 1.11.11 (from 1.11.10)
+ (requested by @Shaurya0108)
 
 3.0.1 (21-Oct-2025)