fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NODEMAILER-6219989

package.json

@@ -75,7 +75,7 @@
         "http-graceful-shutdown": "~3.1.4",
         "iconv-lite": "^0.6.3",
         "jsonwebtoken": "~8.5.1",
-        "nodemailer": "~6.6.5",
+        "nodemailer": "~6.9.9",
         "notp": "~2.0.3",
         "password-hash": "~1.2.2",
         "postcss-rtlcss": "~3.4.1",