Annotations doc links: minor fixes and unification

[gorshunovr]

What this PR does / why we need it: this PR fixes two broken internal links in annotations documentation and unifies other internal links in the same file.

Which issue this PR fixes: n/a

Special notes for your reviewer: n/a

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[gorshunovr]

Signed Individual Contributor License Agreement for Linux Foundation CNCF.

[ghost]

Hello team. Please, add assignee and review. This is a documentation change only. Thank you.

[aledbf]

/lgtm
/approve

[aledbf]

@gorshunovr thanks!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, gorshunovr

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