Bump nodemailer from 6.7.3 to 6.9.9

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.7.3 to 6.9.9.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.7.3...v6.9.9)

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

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

Author: dependabot[bot]

yarn.lock

@@ -4822,9 +4822,9 @@ node-marketo-rest@^0.7.8:
     restler "3.4.x"
 
 nodemailer@^6.6.1:
-  version "6.7.3"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.7.3.tgz#b73f9a81b9c8fa8acb4ea14b608f5e725ea8e018"
-  integrity sha512-KUdDsspqx89sD4UUyUKzdlUOper3hRkDVkrKh/89G+d9WKsU5ox51NWS4tB1XR5dPUdR4SP0E3molyEfOvSa3g==
+  version "6.9.9"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.9.9.tgz#4549bfbf710cc6addec5064dd0f19874d24248d9"
+  integrity sha512-dexTll8zqQoVJEZPwQAKzxxtFn0qTnjdQTchoU6Re9BUUGBJiOy3YMn/0ShTW6J5M0dfQ1NeDeRTTl4oIWgQMA==
 
 nodemon@^1.19.4:
   version "1.19.4"