MINOR: increase delta for certification workflow test (#19977)

It appears to be flaky for small deltas

openmetadata-service/src/test/java/org/openmetadata/service/resources/EntityResourceTest.java

@@ -2509,7 +2509,7 @@ public abstract class EntityResourceTest<T extends EntityInterface, K extends Cr
             (patchedEntity.getCertification().getExpiryDate()
                 - patchedEntity.getCertification().getAppliedDate()),
         30D * 24 * 60 * 60 * 1000,
-        10 * 1000);
+        60 * 1000);
 
     // Create Second Tag
     Tag newCertificationTag =