build(deps-dev): bump @sa11y/jest from 7.3.1 to 7.4.0

Bumps [@sa11y/jest](https://github.com/salesforce/sa11y/tree/HEAD/packages/jest) from 7.3.1 to 7.4.0.
- [Release notes](https://github.com/salesforce/sa11y/releases)
- [Changelog](https://github.com/salesforce/sa11y/blob/master/CHANGELOG.md)
- [Commits](https://github.com/salesforce/sa11y/commits/v7.4.0/packages/jest)

---
updated-dependencies:
- dependency-name: "@sa11y/jest"
  dependency-version: 7.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "devDependencies": {
         "@lwc/eslint-plugin-lwc": "^3.2.0",
         "@prettier/plugin-xml": "^3.4.2",
-        "@sa11y/jest": "^7.3.1",
+        "@sa11y/jest": "^7.4.0",
         "@salesforce/eslint-config-lwc": "^4.0.0",
         "@salesforce/eslint-plugin-aura": "^3.0.0-beta.1",
         "@salesforce/eslint-plugin-lightning": "^2.0.0",