docs: fix typos in page.tsx UI strings

[hungdinh82]

closes: #407

Description

1. “its” without an apostrophe can be possessive. “it is” is the correct expansion here when describing neutrality.
2. “thats” should be written as “that's”, the contraction of “that is.”

Tests

Checklist

• [ ] I have formatted and linted my code
• [ ] All new and existing tests pass
• [ ] My commits are signed (required for merge) -- you may need to rebase if you initially pushed unsigned commits

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[vercel[bot]]

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