Front end Bug with zh-CN language

[UyCode]

Kibana version: 7.12.0

Elasticsearch version:7.12.0

Server OS version: Windows 10

Browser version: edge

Browser OS version: chromium 89

Original install method (e.g. download page, yum, from source, etc.):

Description of the problem including expected versus actual behavior:

Steps to reproduce:

1. open kibana
2. open dashboard
3. edit visualization

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Describe the feature:
In zh-CN mode in kibana, the less than or euqal sign is appears in xml format.
But its normal in en-US mode. here is a screenshot of this bug(right side of the range):

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)