fix(deps): update dependency @nestjs/axios to v4

Author: renovate[bot]

backend/package.json

@@ -33,7 +33,7 @@
     "db:up": "drizzle-kit up"
   },
   "dependencies": {
-    "@nestjs/axios": "3.1.3",
+    "@nestjs/axios": "4.0.0",
     "@nestjs/common": "11.0.10",
     "@nestjs/core": "11.0.10",
     "@nestjs/platform-fastify": "11.0.10",