Update text for Help make Brave better screen

[rebron]

Description

Update finalized strings for new onboarding Help make Brave better screen.

• Use the text in the Expected result screenshot. Figma here: https://www.figma.com/file/MFHpcXJMg2RUQpUJMAZZ4R/Desktop-Onboarding?node-id=4205%3A105911&t=OgwXlQ3MZKgS9Dqj-0
• Learn more link for first check box/crash reports to go to: https://support.brave.com/hc/en-us/articles/360017905872-How-do-I-enable-or-disable-automatic-crash-reporting
• Learn more link for second check box/P3A to go to: https://support.brave.com/hc/en-us/articles/9140465918093-What-is-P3A-in-Brave-

Actual result:

Expected result:

Reproduces how often:

Easily

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release? n/a
• Can you reproduce this issue with the beta channel? yes
• Can you reproduce this issue with the nightly channel? yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? n/a
• Does the issue resolve itself when disabling Brave Rewards? n/a
• Is the issue reproducible on the latest version of Chrome? n/a

Miscellaneous Information:

Follow-up from: #27126
Security review: https://github.com/brave/security/issues/1132
Related Android issue: #23989

[PrivacyMatters]

Thx @rebron Could we also remove the word anonymous from the diagnostics unless @fmarier and @ShivanKaul believe the measures we have in place to strip personal data from reports, does result in them being anonymous.

[rebron]

@PrivacyMatters I updated the screen and removed anonymous from the first checkbox.

[kjozwiak]

The above requires 1.47.131 or higher for 1.47.x verification 👍

[stephendonner]

Verified PASSED using

Brave	1.47.132 Chromium: 108.0.5359.128 (Official Build) beta (x86_64)
Revision	1cd27afdb8e5d057070c0961e04c490d2aca1aa0-refs/branch-heads/5359@{#1185}
OS	macOS Version 11.7.2 (Build 20G1020)

brave://welcome	crash reporting link	p3a link

Confirmed:

• text/copy changes as implemented match the Expected Result, above
• Learn more. link for first check box/crash reports goes to: https://support.brave.com/hc/en-us/articles/360017905872-How-do-I-enable-or-disable-automatic-crash-reporting
• Learn more. link for second check box/P3A to go to: https://support.brave.com/hc/en-us/articles/9140465918093-What-is-P3A-in-Brave-