[6.x] Bump qs from 6.15.0 to 6.15.2 (#14721)

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

Author: dependabot[bot]

package-lock.json

@@ -81,7 +81,7 @@
     "portal-vue": "^3.0.0",
     "pretty": "^2.0.0",
     "pusher-js": "^8.4.0-rc2",
-    "qs": "^6.14.2",
+    "qs": "^6.15.2",
     "read-time-estimate": "0.0.3",
     "reka-ui": "^2.9.2",
     "resize-observer-polyfill": "^1.5.1",