fix(ci): fix yaml syntax error in contributors.yml

[Anandb71]

Description

Brief description of what this PR does. Link any related issues.

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Performance improvement
• Code refactoring

Changes Made

• List the key changes made in this PR
• Be specific about files/modules affected

Testing

Describe how you tested your changes:

• Ran cargo test --all
• Ran cargo clippy --all
• Ran flutter test (if applicable)
• Tested manually with a real codebase

Screenshots (if applicable)

For visualizer changes, include before/after screenshots.

Checklist

• My code follows the project's style guidelines
• I have added tests for my changes
• I have updated the documentation where necessary
• All new and existing tests pass
• I have added appropriate comments where the code isn't self-explanatory

[arbor-cloud]

⚪ Arbor PR Walk

Path heat	NONE ░░░░░░░░░░ 0%
Branch	release-hardening-2.2.0 → main
Impact	2 files · 0 symbols · 0 reachable callers

No code symbols detected in changed files — this looks like a docs, config, or generated-code change.

📊 Analysis confidence: Low · 1425 nodes · 4441ms

• No indexed symbols found in changed files

Suggestions to improve accuracy:

• This may be a docs, config, or non-code change — no structural impact to report

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_{Arbor · View full report → · 4441ms · 1425 nodes · Senior engineer in your repo · Was this useful? 👍 👎}

[github-actions]

🌳 Arbor Impact Report

Risk Level: 🟢 Low | Blast Radius: 0 nodes | Changed Symbols: 84

Changed Files

File	Status
.github/workflows/contributors.yml	Modified
README.md	Modified

📊 Visual Impact Graph

graph TD
  classDef changed fill:#ef4444,stroke:#333,stroke-width:2px,color:#fff;
  classDef caller fill:#f59e0b,stroke:#333,stroke-width:1px,color:#fff;
  class The changed;
  class Why changed;
  class Arbor changed;
  class Table changed;
  class What changed;

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Impact Summary

Metric	Count
Direct callers affected	0
Indirect callers affected	0
API entrypoints impacted	0
Files likely requiring updates	0
Total blast radius	0

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