fix: the rawType of Content was not updated when switching editors

[ruibaby]

Warning

此 PR 的改动来自：halo-dev/halo#3516
因为目前 Console 仓库已经合并到 Halo 主仓库，但主仓库的 release-2.3 分支不包含 Console，所以如果需要发布 2.3.x 的 patch 版本，依旧需要在此仓库修改。

What type of PR is this?

/kind bug
/milestone 2.3.2

What this PR does / why we need it:

修复在新建文章时，首次切换编辑器后没有设置内容 rawType 资源为对应编辑器类型的问题。

Which issue(s) this PR fixes:

Fixes #3512

Special notes for your reviewer:

测试方式：

1. 安装任意一个编辑器插件，比如：https://github.com/halo-sigs/plugin-stackedit
2. 新建文章，选择安装的编辑器。
3. 发布文章。
4. 卸载或者停止编辑器。
5. 重新编辑刚刚创建的文章，如果提示 未找到符合 markdown 格式的编辑器，请检查是否已安装编辑器插件 则代表正常。

Does this PR introduce a user-facing change?

修复在新建文章时，首次切换编辑器后没有设置内容 rawType 资源为对应编辑器类型的问题。

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[guqing]

/lgtm

[JohnNiang]

/approve

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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[JohnNiang]

/cherrypick release-2.3

[halo-dev-bot]

@JohnNiang: once the present PR merges, I will cherry-pick it on top of release-2.3 in a new PR and assign it to you.

In response to this:

/cherrypick release-2.3

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.

[JohnNiang]

/cherrypick release-2.2

[halo-dev-bot]

@JohnNiang: once the present PR merges, I will cherry-pick it on top of release-2.2 in a new PR and assign it to you.

In response to this:

/cherrypick release-2.2

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.

[JohnNiang]

/cherrypick release-2.1

[halo-dev-bot]

@JohnNiang: once the present PR merges, I will cherry-pick it on top of release-2.1 in a new PR and assign it to you.

In response to this:

/cherrypick release-2.1

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.

[halo-dev-bot]

@JohnNiang: new pull request created: #909

In response to this:

/cherrypick release-2.2

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.

[halo-dev-bot]

@JohnNiang: new pull request created: #910

In response to this:

/cherrypick release-2.1

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.

[halo-dev-bot]

@JohnNiang: new pull request created: #911

In response to this:

/cherrypick release-2.3

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.