chore(deps): update commitlint monorepo to v21 (#2900)

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [@commitlint/cli](https://commitlint.js.org/) ([source](https://github.com/conventional-changelog/commitlint/tree/HEAD/@commitlint/cli)) | [`20.5.3` → `21.0.0`](https://renovatebot.com/diffs/npm/@commitlint%2fcli/20.5.3/21.0.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@commitlint%2fcli/21.0.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@commitlint%2fcli/20.5.3/21.0.0?slim=true) |
| [@commitlint/config-conventional](https://commitlint.js.org/) ([source](https://github.com/conventional-changelog/commitlint/tree/HEAD/@commitlint/config-conventional)) | [`20.5.3` → `21.0.0`](https://renovatebot.com/diffs/npm/@commitlint%2fconfig-conventional/20.5.3/21.0.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@commitlint%2fconfig-conventional/21.0.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@commitlint%2fconfig-conventional/20.5.3/21.0.0?slim=true) |

---

### Release Notes

<details>
<summary>conventional-changelog/commitlint (@&#8203;commitlint/cli)</summary>

### [`v21.0.0`](https://github.com/conventional-changelog/commitlint/blob/HEAD/@&#8203;commitlint/cli/CHANGELOG.md#2100-2026-05-08)

[Compare Source](https://github.com/conventional-changelog/commitlint/compare/v20.5.3...v21.0.0)

- chore!: minimum node version v22 ([#&#8203;4679](https://github.com/conventional-changelog/commitlint/issues/4679)) ([ac2b3f4](https://github.com/conventional-changelog/commitlint/commit/ac2b3f4a947670e46af9a738881ba14158f0987a)), closes [#&#8203;4679](https://github.com/conventional-changelog/commitlint/issues/4679)

##### BREAKING CHANGES

- drop node v18 and v20 support

* Bump engines to >=v22 in all 39 package.json files
* Update [@&#8203;types/node](https://github.com/types/node) to ^22.0.0
* Update CI matrix to \[22, 24]
* Update Ubuntu baseline job to ubuntu:26.04
* Update Dockerfile.ci, .mise.toml, .codesandbox/ci.json
* Update pre-commit hook to use --ignore-engines
* Update README and docs

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

#### [20.5.3](https://github.com/conventional-changelog/commitlint/compare/v20.5.2...v20.5.3) (2026-04-30)

**Note:** Version bump only for package [@&#8203;commitlint/cli](https://github.com/commitlint/cli)

#### [20.5.2](https://github.com/conventional-changelog/commitlint/compare/v20.5.1...v20.5.2) (2026-04-25)

**Note:** Version bump only for package [@&#8203;commitlint/cli](https://github.com/commitlint/cli)

</details>

<details>
<summary>conventional-changelog/commitlint (@&#8203;commitlint/config-conventional)</summary>

### [`v21.0.0`](https://github.com/conventional-changelog/commitlint/blob/HEAD/@&#8203;commitlint/config-conventional/CHANGELOG.md#2100-2026-05-08)

[Compare Source](https://github.com/conventional-changelog/commitlint/compare/v20.5.3...v21.0.0)

- chore!: minimum node version v22 ([#&#8203;4679](https://github.com/conventional-changelog/commitlint/issues/4679)) ([ac2b3f4](https://github.com/conventional-changelog/commitlint/commit/ac2b3f4a947670e46af9a738881ba14158f0987a)), closes [#&#8203;4679](https://github.com/conventional-changelog/commitlint/issues/4679)

##### BREAKING CHANGES

- drop node v18 and v20 support

* Bump engines to >=v22 in all 39 package.json files
* Update [@&#8203;types/node](https://github.com/types/node) to ^22.0.0
* Update CI matrix to \[22, 24]
* Update Ubuntu baseline job to ubuntu:26.04
* Update Dockerfile.ci, .mise.toml, .codesandbox/ci.json
* Update pre-commit hook to use --ignore-engines
* Update README and docs

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

#### [20.5.3](https://github.com/conventional-changelog/commitlint/compare/v20.5.2...v20.5.3) (2026-04-30)

**Note:** Version bump only for package [@&#8203;commitlint/config-conventional](https://github.com/commitlint/config-conventional)

</details>

---

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Reviewed-on: https://gitea.unbound.se/dancefinder/dancefinder-app/pulls/2900
Co-authored-by: Renovate Bot <renovate@unbound.se>
Co-committed-by: Renovate Bot <renovate@unbound.se>

package.json

@@ -16,8 +16,8 @@
     "codegen": "graphql-codegen && eslint graphql/generated/operations.ts --fix"
   },
   "devDependencies": {
-    "@commitlint/cli": "20.5.3",
-    "@commitlint/config-conventional": "20.5.3",
+    "@commitlint/cli": "21.0.0",
+    "@commitlint/config-conventional": "21.0.0",
     "@graphql-codegen/cli": "7.0.0",
     "@graphql-codegen/fragment-matcher": "7.0.0",
     "@graphql-codegen/typescript": "6.0.1",