Remove the conditional completed and additionalInfo attribute for dispute task.

[shendy-a8c]

Changes proposed in this Pull Request

Addressing feedbacks from #4388, ie:

1. Since dispute task list will only show if there is non-zero disputes needing response and it will not show if there is 0 disputes needing response, the task list is cannot be completed, so I removed the condition for completed and additionalInfo attribute.
2. Better wording for changelog.

Testing instructions

I can't think of a way to test this changes as it's just a cleaner code.

---

• Run npm run changelog to add a changelog file, choose patch to leave it empty if the change is not significant. You can add multiple changelog files in one PR by running this command a few times.
• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Post merge

• Link to testing instructions from release testing doc following these instructions : Add link here / 'QA Testing Not Applicable'
• Add or update critical flows and testing instructions for critical flows, if applicable.
• Add what's changed (description, screenshot, demo videos etc.) to the release announcement post, if applicable.

[Jinksi]

LGTM @shendy-a8c 💯

I smoke-tested this build with both 1 and 0 disputes and the task looks identical, as expected.