fix: style issue of dialog component icon

[lan-yonghui]

What type of PR is this?

/kind bug
/area core
/area ui

What this PR does / why we need it:

dialog 组件在标题内容过多的时候，icon 会很小，样式出现错位！

Does this PR introduce a user-facing change?

修复当 Dialog 标题过长时，提示图标的样式问题。

[f2c-ci-robot]

@lan-yonghui: The label(s) kind/fix cannot be applied, because the repository doesn't have them.

In response to this:

What type of PR is this?

/kind fix
/area core
/area ui

What this PR does / why we need it:

dialog 组件在标题内容过多的时候，icon 会很小，样式出现错位！

Does this PR introduce a user-facing change?

dialog 组件标题内容过多 icon 样式修复

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.51%. Comparing base (5fdf6c0) to head (a1eee9f).
Report is 162 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5910      +/-   ##
============================================
- Coverage     56.91%   56.51%   -0.40%     
- Complexity     3319     3462     +143     
============================================
  Files           587      612      +25     
  Lines         18968    20473    +1505     
  Branches       1401     1413      +12     
============================================
+ Hits          10795    11570     +775     
- Misses         7594     8322     +728     
- Partials        579      581       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[ruibaby]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ruibaby

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ui/OWNERS [ruibaby]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment