fix(deps): update dependency nodemailer to v6.9.4 (#11819)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

install/package.json

@@ -106,7 +106,7 @@
         "nodebb-theme-peace": "2.1.3",
         "nodebb-theme-persona": "13.2.6",
         "nodebb-widget-essentials": "7.0.13",
-        "nodemailer": "6.9.3",
+        "nodemailer": "6.9.4",
         "nprogress": "0.2.0",
         "passport": "0.6.0",
         "passport-http-bearer": "1.0.1",