fix: re-schedule generics (#614)

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/UpdateControl.java

@@ -47,11 +47,11 @@ public static <T extends CustomResource> UpdateControl<T> noUpdate() {
     return new UpdateControl<>(null, false, false);
   }
 
-  public UpdateControl withReSchedule(long delay, TimeUnit timeUnit) {
+  public UpdateControl<T> withReSchedule(long delay, TimeUnit timeUnit) {
     return withReSchedule(timeUnit.toMillis(delay));
   }
 
-  public UpdateControl withReSchedule(long delay) {
+  public UpdateControl<T> withReSchedule(long delay) {
     this.reScheduleDelay = delay;
     return this;
   }