fix(deps): update dependency @types/koa to v3 (#4148)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/koa/package.json

@@ -7,7 +7,7 @@
     "start": "ts-node src/index.ts"
   },
   "dependencies": {
-    "@types/koa": "2.15.0",
+    "@types/koa": "3.0.0",
     "graphql-yoga": "workspace:*",
     "koa": "3.0.1",
     "supertest": "7.1.4"