Fix release workflow submodule checkout conflict during bundle updates

[Copilot]

The release job in Create Draft Release was failing while updating platform bundles because submodule branch checkout happened after bundle files were modified. This caused Git to abort with local-change overwrite protection.

• Root cause

  • In Build and Update Bundles, yarn bundle:android/yarn bundle:ios modified tracked files, then the workflow executed git checkout main inside android/ios, which failed on dirty working trees.

• Workflow change

  • Reordered submodule operations in .github/workflows/create_draft_release.yml:
    • Checkout/pull main for android and ios before running bundle generation.
    • Keep commit/push logic unchanged, but remove redundant post-build checkout/pull calls.

• Behavioral impact

  • Bundle generation now runs on the intended submodule branch state, and subsequent git add/commit steps can proceed without checkout conflicts.

# before: bundle first, checkout later (fails on dirty tree)
yarn bundle:android
cd android
git checkout main

# after: checkout first, bundle later (no overwrite conflict)
cd android
git checkout main
git pull origin main
cd ..
yarn bundle:android