chore(deps): update dependency mongodb to v6.20.0

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
   },
   "resolutions": {
     "get-pixels@^3>request": "./external/request",
-    "mongodb": "6.12.0",
+    "mongodb": "6.20.0",
     "pino": "./external/pino",
     "semver": "7.7.2",
     "typescript": "5.9.2",