build(deps): bump mailparser from 3.9.3 to 3.9.4

Bumps [mailparser](https://github.com/nodemailer/mailparser) from 3.9.3 to 3.9.4.
- [Release notes](https://github.com/nodemailer/mailparser/releases)
- [Changelog](https://github.com/nodemailer/mailparser/blob/master/CHANGELOG.md)
- [Commits](nodemailer/mailparser@v3.9.3...v3.9.4)

---
updated-dependencies:
- dependency-name: mailparser
  dependency-version: 3.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -96,7 +96,7 @@
     "html-to-text": "^9.0.5",
     "json-stable-stringify": "^1.3.0",
     "jsonwebtoken": "^9.0.3",
-    "mailparser": "^3.9.3",
+    "mailparser": "^3.9.4",
     "marked": "^17.0.3",
     "nodemailer": "^8.0.1",
     "rfc2047": "^4.0.1"