fix: upgrade @sentry/node from 7.19.0 to 7.21.1

Snyk has created this PR to upgrade @sentry/node from 7.19.0 to 7.21.1.

See this package in npm:
https://www.npmjs.com/package/@sentry/node

See this project in Snyk:
https://app.snyk.io/org/maidul98/project/35057e82-ed7d-4e19-ba4d-719a42135cd6?utm_source=github&utm_medium=referral&page=upgrade-pr

backend/package.json

@@ -1,7 +1,7 @@
 {
   "dependencies": {
     "@godaddy/terminus": "^4.11.2",
-    "@sentry/node": "^7.14.0",
+    "@sentry/node": "^7.21.1",
     "@sentry/tracing": "^7.19.0",
     "@types/crypto-js": "^4.1.1",
     "axios": "^1.1.3",