PDFBOX-5660: use different time server

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1927443 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestCreateSignature.java b/examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestCreateSignature.java
index 33a07ad..5b1690e 100644
--- a/examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestCreateSignature.java
+++ b/examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestCreateSignature.java
@@ -193,7 +193,7 @@
 

         // https://stackoverflow.com/questions/4442192/

         NTPUDPClient timeClient = new NTPUDPClient();

-        InetAddress inetAddress = InetAddress.getByName("time.nist.gov");

+        InetAddress inetAddress = InetAddress.getByName("pool.ntp.org");

         timeClient.setDefaultTimeout(Duration.ofMillis(5000));

         TimeInfo timeInfo;

         long returnTime;