Update Translation "抓取请求" to "拉取请求"

[Rickyxrc]

• PR Description

As Chinese developers, we understanding "pull" as “拉取”, and "fetch" as "抓取", the same in your translation, so "Pull Request" should called "拉取请求" in Chinese.

• Please check if the PR fulfills these requirements

• Cheatsheets are up-to-date (run go generate ./...)
• Code has been formatted (see here)
• Tests have been added/updated (see here for the integration test guide)
• Text is internationalised (see here)
• Docs (specifically docs/Config.md) have been updated if necessary
• You've read through your own file changes for silly mistakes etc