optimize the description of Seata-at-mode-start-rm-tm.md

[yangli-stu]

What is the purpose of the change

这里有点错别字，读起来很别扭，更正一下。

Brief changelog

更正“上报分支状态个 TC 服务端”描述为“上报分支状态到 TC 服务端”

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a GITHUB_issue filed for the change(usually before you start working on it). Trivial changes such as typos do not necessitate a GITHUB issue. Your pull request should solely focus on addressing this specific issue without incorporating any other modifications. Each PR should resolve a single issue.
• Format the pull request title like doc: add an operations guide document. Each commit within the pull request should contain a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Test your code locally by running npm run build, and make sure it works as expected.
• Ensure that no files under the build folder are included in the commit, as well as the package-lock.json and yarn.lock files.

[funky-eyes]

LGTM