chore(deps): update rust crate protobuf to v3.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
protobuf	dev-dependencies	patch	3.5.0 -> 3.5.1

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Release Notes

stepancheg/rust-protobuf (protobuf)

### [`v3.5.1`](https://togithub.com/stepancheg/rust-protobuf/blob/HEAD/CHANGELOG.md#351---Unreleased) [Compare Source](https://togithub.com/stepancheg/rust-protobuf/compare/v3.5.0...v3.5.1) - [Remove deprecated `box_pointers` lint](https://togithub.com/stepancheg/rust-protobuf/pull/733)

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