chore(deps): bump nodemailer from 6.4.14 to 6.4.15

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.4.14 to 6.4.15.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.4.14...v6.4.15)

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

package.json

@@ -91,7 +91,7 @@
     "multer": "^1.4.2",
     "mysql": "^2.18.1",
     "node-fetch": "^2.6.1",
-    "nodemailer": "^6.4.14",
+    "nodemailer": "^6.4.15",
     "password-validator": "^5.1.1",
     "puppeteer": "^5.4.1",
     "reflect-metadata": "^0.1.13",