chore(deps): update rust crate diesel to v2.3.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
diesel (source)	dependencies	patch	2.3.3 -> 2.3.4

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Release Notes

diesel-rs/diesel (diesel)

v2.3.4: Diesel 2.3.4

Compare Source

Fixed

• Fix an issue with breaking changes in libmariadb
• Fix documentation links for helper types
• Fix using #[diesel(embed)] with Option<Inner> types
• Fix documentation for concurrent migration runs

You can support the development of Diesel by:

• Contributing Code, Documentation or Guides. Checkout the planing for Diesel 2.4 for open tasks.
• Providing knowledge and help to maintain the MySQL/MariaDB backend. This is currently the only in-tree backend that is not used by any maintainers, so having someone around that actually uses this backend would be very helpful for the Diesel project.
• Answering questions in our discussion forum
• Reporting bugs in our issue tracker
• Helping triaging issues in our issue tracker
• Sponsoring the maintainers.

Full Changelog: diesel-rs/diesel@v2.3.3...v2.3.4

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