<Issue #3534>[website]fix website mailing_lists_url/slack_url (#3535)
<Issue #3534>[website]fix website mailing_lists_url/slack_url (#3535)

Descriptions of the changes in this PR:
The community related variables are not replaced

### Motivation
Poor user experience

### Changes
1、modify Upgrade page template variables
2、add  variables to config

Master Issue: #3534

![image](https://user-images.githubusercontent.com/18533252/195989997-63ac71d3-8d2a-425d-9c45-f0816f18cd80.png)

apache/bookkeeper,apache/bookkeeper,apache/bookkeeper,apache/bookkeeper,apache/bookkeeper,apache/bookkeeper