chore(deps): bump nodemailer from 6.6.1 to 7.0.7 in /backend

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.6.1 to 7.0.7.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](nodemailer/nodemailer@v6.6.1...v7.0.7)

---
updated-dependencies:
- dependency-name: nodemailer
  dependency-version: 7.0.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

backend/package.json

@@ -56,7 +56,7 @@
     "morgan": "^1.10.0",
     "node-cron": "^2.0.3",
     "node-fetch": "^2.6.7",
-    "nodemailer": "^6.6.1"
+    "nodemailer": "^7.0.7"
   },
   "directories": {
     "test": "test"

backend/yarn.lock

@@ -4959,10 +4959,10 @@ node-releases@^1.1.75:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.75.tgz#6dd8c876b9897a1b8e5a02de26afa79bb54ebbfe"
   integrity sha512-Qe5OUajvqrqDSy6wrWFmMwfJ0jVgwiw4T3KqmbTcZ62qW0gQkheXYhcFM1+lOVcGUoRxcEcfyvFMAnDgaF1VWw==
 
-nodemailer@^6.6.1:
-  version "6.6.1"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.6.1.tgz#2a05fbf205b897d71bf43884167b5d4d3bd01b99"
-  integrity sha512-1xzFN3gqv+/qJ6YRyxBxfTYstLNt0FCtZaFRvf4Sg9wxNGWbwFmGXVpfSi6ThGK6aRxAo+KjHtYSW8NvCsNSAg==
+nodemailer@^7.0.7:
+  version "7.0.7"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-7.0.7.tgz#91a16235c08abb7805a4ec1537ca63edca79687f"
+  integrity sha512-jGOaRznodf62TVzdyhKt/f1Q/c3kYynk8629sgJHpRzGZj01ezbgMMWJSAjHADcwTKxco3B68/R+KHJY2T5BaA==
 
 nodemon@^2.0.2:
   version "2.0.4"