build(deps): bump focus-trap in /build/frontend-legacy

Bumps [focus-trap](https://github.com/focus-trap/focus-trap) from 7.6.6 to 7.8.0.
- [Release notes](https://github.com/focus-trap/focus-trap/releases)
- [Changelog](https://github.com/focus-trap/focus-trap/blob/master/CHANGELOG.md)
- [Commits](focus-trap/focus-trap@v7.6.6...v7.8.0)

---
updated-dependencies:
- dependency-name: focus-trap
  dependency-version: 7.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build/frontend-legacy/package-lock.json

@@ -64,7 +64,7 @@
     "debounce": "^3.0.0",
     "dompurify": "^3.3.1",
     "escape-html": "^1.0.3",
-    "focus-trap": "^7.6.5",
+    "focus-trap": "^7.8.0",
     "handlebars": "^4.7.8",
     "is-svg": "^6.1.0",
     "jquery": "~3.7",