⬆️(dependencies) Bump next from 15.4.6 to 15.4.7

Bumps [next](https://github.com/vercel/next.js) from 15.4.6
to 15.4.7.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/compare/v15.4.6...v15.4.7)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.7
  dependency-type: direct:production
...

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

src/frontend/apps/impress/package.json

@@ -46,7 +46,7 @@
     "idb": "8.0.3",
     "lodash": "4.17.21",
     "luxon": "3.7.1",
-    "next": "15.4.6",
+    "next": "15.4.7",
     "posthog-js": "1.258.6",
     "react": "*",
     "react-aria-components": "1.11.0",