Upgrade sentinel-dashboard's jQuery version

## Issue Description

Type: bug report

### Describe what happened

Our application is using Sentinel and is currently undergoing penetration testing. The test scans out the vulnerability of the jQuery version is too low. Users are at risk of being targeted with XSS attacks.

### Describe what you expected to happen

Hope the community can upgrade the version of jQuery to 3.5.0 or later. Or you can tell us how to replace and upgrade the version ourselves.

### How to reproduce it

https://github.com/alibaba/Sentinel/blob/1.8.4/sentinel-dashboard/src/main/webapp/resources/lib/js/jquery.min.js

### Tell us your environment

- Operating env: K8S
- Sentinel version: 1.8.1.1

### Anything else we need to know?
Null

Start with sentinel-dashboard/src/main/webapp/resources/lib/js/jquery.min.js, which the issue identifies as the vulnerable jQuery copy. Upgrade it to jQuery 3.5.0 or later and verify that the dashboard uses the new version and the reported vulnerability is no longer detected.

Written by the indexing model from the issue text.