fix(docs): fix broken example file links in custom-automations.md

[jeremylongshore]

Summary

Fixes 2 broken relative links in docs/custom-automations.md:

Old (broken)	New (correct)
examples/claude-pr-path-specific.yml	examples/pr-review-filtered-paths.yml
examples/claude-review-from-author.yml	examples/pr-review-filtered-authors.yml

Test plan

• [x] Verified target files exist in examples/ directory

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