cla: allow github-actions[bot] to bypass CLA check

[bosconi]

Summary

• Add github-actions[bot] to the CLA allowlist so automated PRs (e.g. from the update-generated-docs workflow) are not blocked by the CLA check
• Unblocks doc: update generated developer documentation #35812

Test plan

• Merge this, then re-run the CLA check on doc: update generated developer documentation #35812 (post a recheck comment)

Generated with Claude Code

[github-actions]

Thanks for opening this PR! Here are a few tips to help make the review process smooth for everyone.

PR title guidelines

• Use imperative mood: "Fix X" not "Fixed X" or "Fixes X"
• Be specific: "Fix panic in catalog sync when controller restarts" not "Fix bug" or "Update catalog code"
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Pre-merge checklist

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[bosconi]

@def- is adding github-actions[bot] to the CLA allowlist the right approach?

The alternative would be to change update-generated-docs.yml to submit the PR as materialize-bot?

[def-]

@def- is adding github-actions[bot] to the CLA allowlist the right approach?

Seems ok to me