improve the English description of review stage 2 to make it clearer

[krnick]

Types of changes

Thanks for sending a pull request! Please fill in the following content to let us know better about this change. Please put an x in the box that applies

• [ ] Bugfix
• [ ] New feature
• [ ] Refactoring
• [ ] Breaking change (any change that would cause existing functionality to not work as expected)
• [x] Documentation Update
• [ ] Other (please describe)

Description

Describe what the change is

• Improve some English grammar for better readability
• Replace the term speaker in the description with the submitter to avoid misunderstanding