chore: bump @halo-dev/richtext-editor version to alpha.30

[ruibaby]

What type of PR is this?

/area console
/kind cleanup
/milestone 2.9.x

What this PR does / why we need it:

升级默认编辑器的版本，包含以下修改：

1. 图片支持修改 alt 属性。 feat: add change image alt supports halo-sigs/richtext-editor#32
2. 拖拽修改图片大小的时候保持等比例。 Supports dragging to modify image size with equal scale halo-sigs/richtext-editor#33
3. 优化在移动端下，编辑器右侧边栏的样式。 perf: refine extra panel styles halo-sigs/richtext-editor#35
4. 编辑器标题、段落及代码块增加 Tab 快捷键缩进。 feat: add an indentation extension to the editor halo-sigs/richtext-editor#34

Does this PR introduce a user-facing change?

升级默认编辑器的版本，包含以下更改：

1. 图片支持修改 alt 属性。 by @GodlessLiu in <https://github.com/halo-sigs/richtext-editor/pull/32>
2. 拖拽修改图片大小的时候保持等比例。 by @GodlessLiu in <https://github.com/halo-sigs/richtext-editor/pull/33>
3. 优化在移动端下，编辑器右侧边栏的样式。 by @ruibaby in <https://github.com/halo-sigs/richtext-editor/pull/35>
4. 编辑器标题、段落及代码块增加 Tab 快捷键缩进。 by @LIlGG in <https://github.com/halo-sigs/richtext-editor/pull/34>

[LIlGG]

/lgtm

[JohnNiang]

/approve

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