chore(deps): update dependency @rsbuild/core to v1.6.15

Author: renovate[bot]

examples/web-platform/packages/react-container/package.json

@@ -16,7 +16,7 @@
     "react-dom": "^19.2.1"
   },
   "devDependencies": {
-    "@rsbuild/core": "1.6.12",
+    "@rsbuild/core": "1.6.15",
     "@rsbuild/plugin-react": "1.4.2",
     "@types/react": "^19.2.7",
     "@types/react-dom": "^19.2.3",