build(deps-dev): bump cypress from 13.6.4 to 13.6.6 in /src (#6192)

Bumps [cypress](https://github.com/cypress-io/cypress) from 13.6.4 to 13.6.6.
- [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/v13.6.4...v13.6.6)

---
updated-dependencies:
- dependency-name: cypress
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/package.json

@@ -88,7 +88,7 @@
     "@types/sinon": "^17.0.3",
     "@types/supertest": "^6.0.2",
     "@types/underscore": "^1.11.15",
-    "cypress": "^13.6.4",
+    "cypress": "^13.6.6",
     "eslint": "^8.56.0",
     "eslint-config-etherpad": "^3.0.22",
     "etherpad-cli-client": "^3.0.1",