chore(deps): Bump nodemailer from 6.7.7 to 6.7.8

Bumps [nodemailer](https://github.com/nodemailer/nodemailer) from 6.7.7 to 6.7.8.
- [Release notes](https://github.com/nodemailer/nodemailer/releases)
- [Changelog](https://github.com/nodemailer/nodemailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodemailer/nodemailer/compare/v6.7.7...v6.7.8)

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

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

sites/backend/package.json

@@ -75,7 +75,7 @@
     "mongoose": "^6.1.8",
     "mongoose-bcrypt": "^1.8.1",
     "mongoose-encryption": "^2.1.0",
-    "nodemailer": "6.7.7",
+    "nodemailer": "6.7.8",
     "passport": "0.6.0",
     "passport-jwt": "4.0.0",
     "query-string": "7.1.1",

yarn.lock

@@ -16733,10 +16733,10 @@ nodemailer-shared@1.1.0:
   dependencies:
     nodemailer-fetch "1.6.0"
 
-nodemailer@6.7.7:
-  version "6.7.7"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.7.7.tgz#e522fbd7507b81c51446d3f79c4603bf00083ddd"
-  integrity sha512-pOLC/s+2I1EXuSqO5Wa34i3kXZG3gugDssH+ZNCevHad65tc8vQlCQpOLaUjopvkRQKm2Cki2aME7fEOPRy3bA==
+nodemailer@6.7.8:
+  version "6.7.8"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.7.8.tgz#9f1af9911314960c0b889079e1754e8d9e3f740a"
+  integrity sha512-2zaTFGqZixVmTxpJRCFC+Vk5eGRd/fYtvIR+dl5u9QXLTQWGIf48x/JXvo58g9sa0bU6To04XUv554Paykum3g==
 
 nodemon@2.0.19:
   version "2.0.19"