fix: remove misplaced shebang causing CI syntax error in validate-yaml.js

[Copilot]

The CI workflow "Validate YAML Metadata" was failing with SyntaxError: Invalid or unexpected token when executing pnpm exec node scripts/validate-yaml.js.

Root Cause

The shebang #!/usr/bin/env node was on line 9 (after the license header) instead of line 1. When Node.js explicitly loads a file, shebangs in non-first-line positions are interpreted as JavaScript code.

// Before (line 9 - causes SyntaxError)
/**
 * LICENSE HEADER
 */

#!/usr/bin/env node  // ❌ Treated as invalid JS syntax
/**
 * Script docs
 */

// After (no shebang needed)
/**
 * LICENSE HEADER
 */

/**
 * Script docs
 */

Changes

• Removed the misplaced shebang from scripts/validate-yaml.js
• Shebang is unnecessary since the workflow invokes the script with node explicitly

The script now matches the pattern used by check-versions.js which also runs via explicit node invocation without a shebang.

Original prompt

引用: https://github.com/objectstack-ai/objectql/actions/runs/21106340992/job/60698414476#step:6:1

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