Update reference.conf

Author: pjfanning

serialization-jackson/src/main/resources/reference.conf

@@ -46,8 +46,8 @@ pekko.serialization.jackson {
     max-number-length = 1000
     max-string-length = 20000000
     max-name-length = 50000
-    # max-document-length of 0 means unlimited
-    max-document-length = 0
+    # max-document-length of -1 means unlimited
+    max-document-length = -1
   }
   write {
     # see https://www.javadoc.io/static/com.fasterxml.jackson.core/jackson-core/2.16.0/com/fasterxml/jackson/core/StreamWriteConstraints.html