Remove duplicate permissions block in verify workflow

[Copilot]

The verify workflow contained two identical permissions: contents: read blocks, which is invalid YAML—duplicate keys cause only the last declaration to apply.

Changes:

• Removed the duplicate permissions block after the on: section
• Retained single top-level permissions block at workflow start

Before:

name: Verify

permissions:
  contents: read

on:
  push:
  pull_request:

permissions:
  contents: read  # duplicate

After:

name: Verify

permissions:
  contents: read

on:
  push:
  pull_request:

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