docs: fix minor typo and broken link

[foxytanuki]

Description

Fix typos and a broken link that fails to redirect.

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Author Checklist

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please add links to any relevant follow up issues.

I have...

• included the correct docs: prefix in the PR title
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the documentation writing guidelines
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct docs: prefix in the PR title
• confirmed all author checklist items have been addressed
• confirmed that this PR only changes documentation
• reviewed content for consistency
• reviewed content for thoroughness
• reviewed content for spelling and grammar
• tested instructions (if applicable)