build(deps): bump mongoose from 5.9.15 to 5.9.16 (#12269)

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.9.15 to 5.9.16.
- [Release notes](https://github.com/Automattic/mongoose/releases)
- [Changelog](https://github.com/Automattic/mongoose/blob/master/History.md)
- [Commits](https://github.com/Automattic/mongoose/compare/5.9.15...5.9.16)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -48,7 +48,7 @@
     "method-override": "^3.0.0",
     "moment": "^2.26.0",
     "moment-recur": "^1.0.7",
-    "mongoose": "^5.9.15",
+    "mongoose": "^5.9.16",
     "morgan": "^1.10.0",
     "nconf": "^0.10.0",
     "node-gcm": "^1.0.2",