chore(deps): update dependency @types/dotenv to v8

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "devDependencies": {
         "@types/bluebird": "3.5.42",
         "@types/cookie-parser": "1.4.9",
-        "@types/dotenv": "6.1.1",
+        "@types/dotenv": "8.2.3",
         "@types/express-serve-static-core": "4.19.2",
         "@types/jest": "30.0.0",
         "@types/multer": "1.4.11",