Update driver-sync/src/test/functional/com/mongodb/client/WithTransactionProseTest.java

Co-authored-by: Valentin Kovalenko <valentin.male.kovalenko@gmail.com>

Author: nhachicha

driver-sync/src/test/functional/com/mongodb/client/WithTransactionProseTest.java

@@ -256,8 +256,7 @@ void testRetryBackoffIsEnforced() {
                 collection.insertOne(session, Document.parse("{ _id : 'backoff-test-no-jitter' }"));
                 return null;
             });
-            long endNanos = System.nanoTime();
-            noBackoffTime = TimeUnit.NANOSECONDS.toMillis(endNanos - startNanos);
+            noBackoffTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos);```
         } finally {
             // Clear the test jitter supplier to avoid affecting other tests
             ExponentialBackoff.clearTestJitterSupplier();