Bump qs from 6.4.0 to 6.4.1 in /generator-exercise

Bumps [qs](https://github.com/ljharb/qs) from 6.4.0 to 6.4.1.
- [Release notes](https://github.com/ljharb/qs/releases)
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ljharb/qs/compare/v6.4.0...v6.4.1)

---
updated-dependencies:
- dependency-name: qs
  dependency-type: indirect
...

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

generator-exercise/package-lock.json

@@ -3927,9 +3927,9 @@
       "dev": true
     },
     "qs": {
-      "version": "6.4.0",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
-      "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.1.tgz",
+      "integrity": "sha512-LQy1Q1fcva/UsnP/6Iaa4lVeM49WiOitu2T4hZCyA/elLKu37L99qcBJk4VCCk+rdLvnMzfKyiN3SZTqdAZGSQ==",
       "dev": true
     },
     "randomatic": {