fix: upgrade nodemailer from 6.6.1 to 6.6.3

Snyk has created this PR to upgrade nodemailer from 6.6.1 to 6.6.3.

See this package in npm:
https://www.npmjs.com/package/nodemailer

See this project in Snyk:
https://app.snyk.io/org/aurora-dot/project/9cfc4c42-5737-43cf-8306-7bc2f6ab4033?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -27,7 +27,7 @@
     "helmet": "^4.6.0",
     "http-errors": "^1.8.0",
     "morgan": "^1.10.0",
-    "nodemailer": "^6.6.1",
+    "nodemailer": "^6.6.3",
     "pug": "^3.0.2",
     "tailwind-hamburgers": "^1.1.1",
     "winston": "^3.3.3",