fix: upgrade helmet from 5.1.0 to 5.1.1

Snyk has created this PR to upgrade helmet from 5.1.0 to 5.1.1.

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

See this project in Snyk:
https://app.snyk.io/org/mystikfluu/project/c5b23892-809c-4121-9c2f-67962c7a4953?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -6,7 +6,7 @@
     "express": "^4.18.1",
     "express-fileupload": "^1.3.1",
     "express-useragent": "^1.0.15",
-    "helmet": "^5.1.0",
+    "helmet": "^5.1.1",
     "jimp": "^0.16.1",
     "mysql": "^2.18.1",
     "ws": "^8.8.1"