chore(deps): update dependency @rsbuild/core to ^1.7.1

Author: renovate[bot]

packages/vant-cli/package.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "@babel/core": "^7.28.5",
     "@babel/preset-typescript": "^7.28.5",
-    "@rsbuild/core": "^1.6.15",
+    "@rsbuild/core": "^1.7.1",
     "@rsbuild/plugin-babel": "^1.0.6",
     "@rsbuild/plugin-less": "^1.5.0",
     "@rsbuild/plugin-sass": "^1.4.0",