chore(deps): Bump nodemailer from 6.7.0 to 6.9.9

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.7.0 to 6.9.9.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/nodemailer/compare/v6.7.0...v6.9.9)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-type: direct:production
...

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

packages/backend/package.json

@@ -57,7 +57,7 @@
     "morgan": "^1.10.0",
     "multer": "1.4.5-lts.1",
     "node-html-markdown": "^1.3.0",
-    "nodemailer": "6.7.0",
+    "nodemailer": "6.9.9",
     "oauth-1.0a": "^2.2.6",
     "objection": "^3.0.0",
     "passport": "^0.6.0",

yarn.lock

@@ -11458,10 +11458,10 @@ node-releases@^2.0.1:
   resolved "https://registry.npmjs.org/node-releases/-/node-releases-2.0.1.tgz"
   integrity sha512-CqyzN6z7Q6aMeF/ktcMVTzhAHCEpf8SOarwpzpf8pNBY2k5/oM34UHldUwp8VKI7uxct2HxSRdJjBaZeESzcxA==
 
-nodemailer@6.7.0:
-  version "6.7.0"
-  resolved "https://registry.npmjs.org/nodemailer/-/nodemailer-6.7.0.tgz"
-  integrity sha512-AtiTVUFHLiiDnMQ43zi0YgkzHOEWUkhDgPlBXrsDzJiJvB29Alo4OKxHQ0ugF3gRqRQIneCLtZU3yiUo7pItZw==
+nodemailer@6.9.9:
+  version "6.9.9"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.9.9.tgz#4549bfbf710cc6addec5064dd0f19874d24248d9"
+  integrity sha512-dexTll8zqQoVJEZPwQAKzxxtFn0qTnjdQTchoU6Re9BUUGBJiOy3YMn/0ShTW6J5M0dfQ1NeDeRTTl4oIWgQMA==
 
 nodemon@^2.0.13:
   version "2.0.15"