chore(deps): bump pallet-election-provider-multi-phase

Bumps [pallet-election-provider-multi-phase](https://github.com/paritytech/polkadot-sdk) from 33.0.0 to 34.0.0.
- [Release notes](https://github.com/paritytech/polkadot-sdk/releases)
- [Changelog](https://github.com/paritytech/polkadot-sdk/blob/master/docs/RELEASE.md)
- [Commits](https://github.com/paritytech/polkadot-sdk/commits)

---
updated-dependencies:
- dependency-name: pallet-election-provider-multi-phase
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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