perf: remove html lang attribute in console (#4085)

#### 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 https://github.com/halo-dev/halo/issues/3692

#### Special notes for your reviewer:

#### Does this PR introduce a user-facing change?


```release-note
避免 Console 端出现翻译提示
```
pull/4041/head
longjuan 2023-06-19 09:30:10 +08:00 committed by GitHub
parent 02369fbd3c
commit 1b581d5d6f
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1 changed files with 1 additions and 1 deletions

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@ -1,5 +1,5 @@
<!DOCTYPE html>
<html lang="en">
<html>
<head>
<meta charset="UTF-8" />
<meta content="IE=edge" http-equiv="X-UA-Compatible" />