build(deps-dev): bump @cypress/webpack-preprocessor from 6.0.2 to 6.0.4

Bumps [@cypress/webpack-preprocessor](https://github.com/cypress-io/cypress) from 6.0.2 to 6.0.4.
- [Release notes](https://github.com/cypress-io/cypress/releases)
- [Changelog](https://github.com/cypress-io/cypress/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/cypress-io/cypress/compare/@cypress/webpack-preprocessor-v6.0.2...@cypress/webpack-preprocessor-v6.0.4)

---
updated-dependencies:
- dependency-name: "@cypress/webpack-preprocessor"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -123,7 +123,7 @@
     "@babel/plugin-transform-private-methods": "^7.25.9",
     "@babel/preset-typescript": "^7.26.0",
     "@cypress/vue2": "^2.1.1",
-    "@cypress/webpack-preprocessor": "^6.0.2",
+    "@cypress/webpack-preprocessor": "^6.0.4",
     "@nextcloud/babel-config": "^1.2.0",
     "@nextcloud/cypress": "^1.0.0-beta.14",
     "@nextcloud/eslint-config": "^8.4.2",