fix: bump @dotcom-reliability-kit/errors from 3.1.2 to 4.0.0

Bumps [@dotcom-reliability-kit/errors](https://github.com/Financial-Times/dotcom-reliability-kit/tree/HEAD/packages/errors) from 3.1.2 to 4.0.0.
- [Release notes](https://github.com/Financial-Times/dotcom-reliability-kit/releases)
- [Changelog](https://github.com/Financial-Times/dotcom-reliability-kit/blob/main/packages/errors/CHANGELOG.md)
- [Commits](https://github.com/Financial-Times/dotcom-reliability-kit/commits/errors-v4.0.0/packages/errors)

---
updated-dependencies:
- dependency-name: "@dotcom-reliability-kit/errors"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "@dotcom-reliability-kit/crash-handler": "^5.0.0",
-    "@dotcom-reliability-kit/errors": "^3.1.2",
+    "@dotcom-reliability-kit/errors": "^4.0.0",
     "@dotcom-reliability-kit/log-error": "^4.0.4",
     "@dotcom-reliability-kit/middleware-log-errors": "^4.2.6",
     "@dotcom-reliability-kit/middleware-render-error-info": "^6.0.0",