chore: enable scheduled dependency update PR

[deleonio]

Summary

• schedule weekly auto dependency updater
• open pull requests with updated dependencies for main and release/2 branches

Testing

• pnpm format
• pnpm build
• pnpm lint
• pnpm test
• act -l (command not found)

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https://chatgpt.com/codex/tasks/task_e_68c76438c898832b99ff459f5a7e8279

[github-actions]

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[chatgpt-codex-connector]

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[Copilot]

Pull Request Overview

This PR enables a scheduled GitHub Actions workflow for automated dependency updates. The workflow will now run weekly on Sundays at 2 AM UTC and create pull requests with updated dependencies for both the main development branch and the release/2 branch.

• Enables the previously commented-out scheduled trigger to run weekly
• Implements a matrix strategy to handle dependency updates for multiple branches (develop and release/2)
• Replaces manual git operations with the peter-evans/create-pull-request action for better PR creation