fix(deps): update dependency @koa/router to v12 (open-telemetry#1483)

Co-authored-by: Haddas Bronfman <[email protected]>

Author: renovate-bot

plugins/node/opentelemetry-instrumentation-koa/examples/package.json

@@ -30,7 +30,7 @@
     "url": "https://github.com/open-telemetry/opentelemetry-js-contrib/issues"
   },
   "dependencies": {
-    "@koa/router": "^9.3.1",
+    "@koa/router": "^12.0.0",
     "@opentelemetry/api": "^1.0.0",
     "@opentelemetry/exporter-jaeger": "^1.0.0",
     "@opentelemetry/exporter-zipkin": "^1.0.0",