fix: upgrade @sendgrid/mail from 7.4.4 to 7.4.6

Snyk has created this PR to upgrade @sendgrid/mail from 7.4.4 to 7.4.6.

See this package in npm:
https://www.npmjs.com/package/@sendgrid/mail

See this project in Snyk:
https://app.snyk.io/org/aurora-dot/project/9cfc4c42-5737-43cf-8306-7bc2f6ab4033?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -17,7 +17,7 @@
     "build-tailwind": "npx postcss src/tailwind.css -o public/stylesheets/style.css"
   },
   "dependencies": {
-    "@sendgrid/mail": "^7.4.4",
+    "@sendgrid/mail": "^7.4.6",
     "app-root-path": "^3.0.0",
     "axios": "^0.21.3",
     "cookie-parser": "^1.4.5",