chore: specify charset when converting string to bytes

For consistency with other places where this is done

Signed-off-by: Dale Lane <[email protected]>

Author: dalelane

src/main/java/com/ibm/eventstreams/connect/mqsource/builders/JsonRecordBuilder.java

@@ -126,7 +126,7 @@ public SchemaAndValue getValue(final JMSContext context, final String topic, fin
         if (recordBuilderSchemaSupport) {
             return converter.toConnectData(topic,
                 // embed schema in the event payload
-                (schemaSupportEnvelope + new String(payload) + "}").getBytes());
+                (schemaSupportEnvelope + new String(payload) + "}").getBytes(UTF_8));
         } else {
             return converter.toConnectData(topic,
                 // submit the payload as-is to the converter