set version to ^6.21.0

Author: pmeijer

package-lock.json

@@ -70,7 +70,7 @@
     "method-override": "^3.0.0",
     "mime": "^3.0.0",
     "mongo-uri": "^0.1.2",
-    "mongodb": "^6.0.0",
+    "mongodb": "^6.21.0",
     "ncp": "^2.0.0",
     "nodemailer": "^6.4.6",
     "pug": "^3.0.0",