Bump mysql2 from 3.20.0 to 3.21.0 in /backend

[dependabot]

Bumps mysql2 from 3.20.0 to 3.21.0.

Release notes

Sourced from mysql2's releases.

v3.21.0

3.21.0 (2026-04-09)

Features

• add support for query attributes (#4223) (d732f78)
• types: export ExecuteValues and QueryValues from entry point (9fafd6f)

Changelog

Sourced from mysql2's changelog.

3.21.0 (2026-04-09)

Features

• add support for query attributes (#4223) (d732f78)
• types: export ExecuteValues and QueryValues from entry point (9fafd6f)

Commits

• 0388783 chore(master): release 3.21.0 (#4220)
• 972e6a7 build(deps): bump lodash from 4.17.23 to 4.18.1 in /website (#4222)
• f1b322d build(deps-dev): bump lodash from 4.17.23 to 4.18.1 (#4221)
• d732f78 feat: add support for query attributes (#4223)
• 3f1ca9f build(deps): bump path-to-regexp from 0.1.12 to 0.1.13 in /website (#4213)
• 2960150 build(deps): bump node-forge from 1.3.2 to 1.4.0 in /website (#4212)
• ffc9fc7 build(deps): bump lucide-react from 0.577.0 to 1.7.0 in /website (#4211)
• af0c849 build(deps-dev): bump @​typescript-eslint/parser from 8.57.0 to 8.57.2 (#4202)
• 423c1b3 build(deps-dev): bump rollup from 4.59.0 to 4.60.0 (#4201)
• 6dbb705 build(deps-dev): bump flatted from 3.4.1 to 3.4.2 (#4200)
• Additional commits viewable in compare view

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[github-actions]

Provenance Attestation Check Failed

This pull request has been automatically closed because the following dependencies do not have provenance attestation:

Failed: mysql2

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[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.