Remove unnecessary permission grant for gradlew

[Arzu-N]

Removed step to grant execute permission for gradlew.

What does this change?

Briefly explain what you changed and why.

Related issue

Closes #

Area

• Frontend (apps/web)
• Backend
• Docs
• Other

Screenshots

If this touches the UI, drop before and after screenshots here.

Checklist

• I ran bun run typecheck && bun run build in apps/web (for frontend changes)
• I bumped the version if this is a meaningful change
• Commits are small and focused, with no AI attribution lines
• I updated docs or AGENTS.md if behavior or structure changed

[Arzu-N]

The gradlew file already has the necessary execution permissions in Git, so this step is redundant. Approved."