chore(deps): bump koa from 2.16.1 to 3.0.0 in /examples/openid-connect (#2241)

Author: dependabot[bot]

examples/openid-connect/package.json

@@ -13,7 +13,7 @@
     "@koa/router": "^13.0.0",
     "@slack/web-api": "^7.3.4",
     "jsonwebtoken": "^9.0.2",
-    "koa": "^2.13.1",
+    "koa": "^3.0.0",
     "uuid": "^11.0.2"
   }
 }