fix: upgrade dotenv from 16.3.1 to 16.4.1

Snyk has created this PR to upgrade dotenv from 16.3.1 to 16.4.1.

See this package in npm:
https://www.npmjs.com/package/dotenv

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-lock.json

@@ -34,7 +34,7 @@
         "axios-retry": "^4.0.0",
         "bcrypt": "^5.1.1",
         "bullmq": "^5.1.6",
-        "dotenv": "^16.3.1",
+        "dotenv": "^16.4.1",
         "fastify": "^4.26.0",
         "fastify-plugin": "^4.5.1",
         "handlebars": "^4.7.8",
@@ -5995,9 +5995,9 @@
       }
     },
     "node_modules/dotenv": {
-      "version": "16.3.1",
-      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.3.1.tgz",
-      "integrity": "sha512-IPzF4w4/Rd94bA9imS68tZBaYyBWSCE47V1RGuMrB94iyTOIEwRmVL2x/4An+6mETpLrKJ5hQkB8W4kFAadeIQ==",
+      "version": "16.4.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.1.tgz",
+      "integrity": "sha512-CjA3y+Dr3FyFDOAMnxZEGtnW9KBR2M0JvvUtXNW+dYJL5ROWxP9DUHCwgFqpMk0OXCc0ljhaNTr2w/kutYIcHQ==",
       "engines": {
         "node": ">=12"
       },