fix(mail): minimify comments

Author: vinceh121

gmcserver-email/package.json

@@ -8,9 +8,9 @@
   "license": "AGPL-3.0-or-later",
   "private": true,
   "scripts": {
-    "build": "mjml -r *.mjml --config.fonts='{}' --config.minify --config.beautify=false -o out/ "
+    "build": "mjml -r *.mjml --config.fonts='{}' --config.minify --config.minifyOptions='{\"removeComments\":true}' --config.beautify=false -o out/ "
   },
   "dependencies": {
-    "mjml": "^4.6.3"
+    "mjml": "^4.13.0"
   }
 }