fix: upgrade helmet from 7.1.0 to 7.2.0

Snyk has created this PR to upgrade helmet from 7.1.0 to 7.2.0.

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

See this project in Snyk:
https://app.snyk.io/org/beaubouchard/project/426c6eb0-ed33-49f9-80fa-cb5008c626e7?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -21,7 +21,7 @@
   "dependencies": {
     "chai-http": "4.4.0",
     "express": "4.19.2",
-    "helmet": "7.1.0",
+    "helmet": "7.2.0",
     "mta-gtfs": "1.1.0",
     "sst": "git+https://github.com/wh-iterabb-it/sst.git",
     "striptags": "3.2.0"