🌐 Update Chinese localisation

[Cccc-owo]

Markdown should not be translated to 降价

All Submissions:

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. [x] Does your submission work for all the platforms?
2. [x] Have you lint your code locally before submission? (using flutter_lints package)

Changes to Core Features:

• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [x] Have you added the feature to the features column of readme.md ?

[adeeteya]

Are the other translation on point? Could you please check once more before I merge?

[Cccc-owo]

Are the other translation on point? Could you please check once more before I merge?

@adityar224 Yeah, looks almost fine even before correcting. I think you can merge it.