Fix incorrect import in IonJavaTimeModule

Author: cowtowncoder

ion/src/main/java/com/fasterxml/jackson/dataformat/ion/jsr310/IonJavaTimeModule.java

@@ -4,9 +4,10 @@
 import java.time.OffsetDateTime;
 import java.time.ZonedDateTime;
 
-import com.fasterxml.jackson.core.json.PackageVersion;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 
+import com.fasterxml.jackson.dataformat.ion.PackageVersion;
+
 /**
  * A module that installs a collection of serializers and deserializers for java.time classes.
  */