chore(deps): update dependency mongodb to v7

Author: renovate[bot]

deno.json

@@ -54,7 +54,7 @@
     "@opentelemetry/resources": "npm:@opentelemetry/resources@^2.5.1",
     "@opentelemetry/semantic-conventions": "npm:@opentelemetry/semantic-conventions@^1.39.0",
     "@opentelemetry/sdk-metrics": "npm:@opentelemetry/sdk-metrics@^2.5.1",
-    "mongodb": "npm:mongodb@^6.21.0",
+    "mongodb": "npm:mongodb@^7.0.0",
     "zod": "npm:zod@3.25.76"
   },
   "tasks": {