fix: api/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-KOA-10944994

Author: snyk-bot

api/package.json

@@ -51,7 +51,7 @@
     "cron-parser": "^4.6.0",
     "dotenv": "^16.0.0",
     "generic-pool": "^3.8.2",
-    "koa": "^2.13.4",
+    "koa": "^3.0.1",
     "koa-body": "^5.0.0",
     "koa-router": "^10.1.1",
     "koa-static": "^5.0.0",