Merge branch '2.x' into 3.x

Author: cowtowncoder

ion/src/test/java/tools/jackson/dataformat/ion/IonNumberOverflowTest.java

@@ -81,7 +81,9 @@ public void testLongAsBigIntegerSize() throws Exception {
         IonParser bigIntLongParser = (IonParser) new IonFactory().createParser(ObjectReadContext.empty(),
                 bigIntLongValue.toString());
         assertEquals(JsonToken.VALUE_NUMBER_INT, bigIntLongParser.nextToken());
-        assertEquals(JsonParser.NumberType.BIG_INTEGER, bigIntLongParser.getNumberType());
+        // 23-Oct-2025: Ion 1.11.11+ changed behavior: values that fit in long are now
+        //   classified as LONG (was BIG_INTEGER before)
+        assertEquals(JsonParser.NumberType.LONG, bigIntLongParser.getNumberType());
         assertEquals(JsonParser.NumberTypeFP.UNKNOWN, bigIntLongParser.getNumberTypeFP());
         assertEquals(bigIntLongValue.longValue(), bigIntLongParser.getLongValue());
     }    

release-notes/VERSION-2.x

@@ -16,7 +16,8 @@ Active maintainers:
 
 2.21.0 (not yet released)
 
-No changes since 2.20
+#623: (ion) Upgrade `ion-java` dep to 1.11.11 (from 1.11.10)
+ (requested by @Shaurya0108)
 
 2.20.1 (not yet released)