chore(deps): bump nodemailer from 6.9.8 to 6.9.9 in /packages/backend

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.9.8 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@v6.9.8...v6.9.9)

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

Signed-off-by: dependabot[bot] <[email protected]>

packages/backend/package.json

@@ -142,7 +142,7 @@
 		"nanoid": "5.0.4",
 		"nested-property": "4.0.0",
 		"node-fetch": "3.3.2",
-		"nodemailer": "6.9.8",
+		"nodemailer": "6.9.9",
 		"nsfwjs": "2.4.2",
 		"oauth": "0.10.0",
 		"oauth2orize": "1.12.0",