feat(ruby): Add set_data docs

[sl0thentr0py]

DESCRIBE YOUR PR

for https://github.com/getsentry/projects/issues/524

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SLA

• Teamwork makes the dream work, so please add a reviewer to your PRs.
• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 9, 2025 3:35pm

2 Skipped Deployments

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[adinauer]

LGTM

[codecov]

Bundle Report

Changes will increase total bundle size by 189 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	10.37MB	195 bytes (0.0%) ⬆️
sentry-docs-client-array-push	9.3MB	6 bytes (-0.0%) ⬇️