chore(deps-dev): bump koa

Bumps the npm_and_yarn group with 1 update in the /plugins/node/opentelemetry-instrumentation-koa directory: [koa](https://github.com/koajs/koa).


Updates `koa` from 3.0.3 to 3.1.2
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](koajs/koa@v3.0.3...v3.1.2)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 3.1.2
  dependency-type: direct:development
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

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

@@ -56,7 +56,7 @@
     "@types/mocha": "7.0.2",
     "@types/node": "16.11.21",
     "gts": "3.1.0",
-    "koa": "3.0.3",
+    "koa": "3.1.2",
     "mocha": "7.2.0",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",