RFR [15] 8245981: Upgrade to jQuery 3.5.1

[Pavel Rappo]

Hello,

Please review the change for https://bugs.openjdk.java.net/browse/JDK-8245981

  http://cr.openjdk.java.net/~prappo/8245981/webrev.00/

This upgrades the jQuery library to the latest release 3.5.1. I've checked that the API documentation for JDK continues to work as expected on macOS Chrome and Firefox; on Windows Internet Explorer and Edge. Our continuous integration system also shows no test failures.

-Pavel