fix(deps): update rust crate flatbuffers to v22 [security]

This PR contains the following updates:

Package	Type	Update	Change
flatbuffers (source)	dependencies	major	`2.1` -> `22.9`

GitHub Vulnerability Alerts

GHSA-3jch-9qgp-4844

Code generated by flatbuffers' compiler is unsafe but not marked as such. See https://github.com/google/flatbuffers/issues/6627 for details.

All users that use generated code by flatbuffers compiler are recommended to:

not expose flatbuffer generated code as part of their public APIs
audit their code and look for any usage of follow, push, or any method that uses them (e.g. self_follow).
Carefuly go through the crates' documentation to understand which "safe" APIs are not intended to be used.

Release Notes

google/flatbuffers (flatbuffers)

### [`v22.9.29`](https://togithub.com/google/flatbuffers/blob/HEAD/CHANGELOG.md#22929-Sept-29-2022) - Rust soundness fixes to avoid the crate from bing labelled unsafe ([#7518](https://togithub.com/google/flatbuffers/issues/7518)).

Configuration

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🚦 Automerge: Enabled.

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⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

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any of the package files in this branch needs updating, or
the branch becomes conflicted, or
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The artifact failure details are included below:

File name: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --package flatbuffers@2.1.2 --precise 22.9.29
error: package ID specification `flatbuffers@2.1.2` did not match any packages
Did you mean one of these?

  flatbuffers@22.12.6

alixinne / hyperion.rs