chore(deps): bump qs from 6.15.1 to 6.15.2

Bumps [qs](https://github.com/ljharb/qs) from 6.15.1 to 6.15.2.
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ljharb/qs/compare/v6.15.1...v6.15.2)

---
updated-dependencies:
- dependency-name: qs
  dependency-version: 6.15.2
  dependency-type: direct:production
...

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

plugins/search/package.json

@@ -70,7 +70,7 @@
     "@backstage/version-bridge": "workspace:^",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
-    "qs": "^6.9.4",
+    "qs": "^6.15.2",
     "react-use": "^17.2.4",
     "zod": "^4.0.0"
   },