fix(ci): add flutter pub get step for quill_native_bridge

[EchoEllet]

Description

Add flutter pub get step for quill_native_bridge to fix CI failure in #2264.

Related Issues

• Related revert: "Resolved issue with broken IME composing rect in Windows desktop" #2264

Type of Change

• ✨ New feature: Adds new functionality without breaking existing features.
• 🛠️ Bug fix: Resolves an issue without altering current behavior.
• 🧹 Code refactor: Code restructuring that does not affect behavior.
• ❌ Breaking change: Alters existing functionality and requires updates.
• 🧪 Tests: Adds new tests or modifies existing tests.
• 📝 Documentation: Updates or additions to documentation.
• 🗑️ Chore: Routine tasks, or maintenance.
• ✅ Build configuration change: Changes to build or deploy processes.