perf: remove html lang attribute in console

[longjuan]

What type of PR is this?

/kind improvement
/area console

What this PR does / why we need it:

去除index.html的lang属性以避免console端出现翻译提示

Which issue(s) this PR fixes:

Fixes #3692

Special notes for your reviewer:

Does this PR introduce a user-facing change?

移除 Console 端页面的 lang 属性，避免出现浏览器的翻译提示。

[codecov]

Codecov Report

Merging #4085 (cbd04e1) into main (02369fb) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #4085   +/-   ##
=========================================
  Coverage     60.22%   60.22%           
  Complexity     2385     2385           
=========================================
  Files           357      357           
  Lines         12392    12392           
  Branches        892      892           
=========================================
  Hits           7463     7463           
  Misses         4492     4492           
  Partials        437      437           

[ruibaby]

/lgtm

[JohnNiang]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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• console/OWNERS [JohnNiang]

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