fix: Fix typo on MetaMetrics agreement screen

[mcmire]

Description

It's important that we spell everything correctly on a screen that we want everyone to read.

Related issues

N/A, just something I noticed while using the app locally.

Manual testing steps

1. Starting from the Welcome screen, tap "Get started".
2. Tap one of the two options.
3. On the "Help us improve MetaMask" screen, see that the text next to the checkbox is free of typos.

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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