Chaned the access level (#328)

Author: rahulpadhy-traceable

config-object-store/src/main/java/org/hypertrace/config/objectstore/ContextualConfigObjectImpl.java

@@ -11,7 +11,7 @@
 
 @lombok.Value
 @Builder(toBuilder = true)
-public class ContextualConfigObjectImpl<T> implements ContextualConfigObject<T> {
+class ContextualConfigObjectImpl<T> implements ContextualConfigObject<T> {
   String context;
   T data;
   Instant creationTimestamp;