build-assets/package.json: bump deps

Author: ilg-ul

build-assets/package-lock.json

@@ -7,7 +7,7 @@
   "xpack": {
     "minimumXpmRequired": "0.16.3",
     "devDependencies": {
-      "@xpack-dev-tools/xbb-helper": "^3.0.14"
+      "@xpack-dev-tools/xbb-helper": "^3.0.15"
     },
     "properties": {
       "appName": "QEMU RISC-V",