chore:(deps): bump @polkadot/api from 3.10.2 to 3.11.1 (#449)

Bumps [@polkadot/api](https://github.com/polkadot-js/api) from 3.10.2 to 3.11.1.
- [Release notes](https://github.com/polkadot-js/api/releases)
- [Changelog](https://github.com/polkadot-js/api/blob/master/CHANGELOG.md)
- [Commits](polkadot-js/api@v3.10.2...v3.11.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>