Bump koa from 3.0.1 to 3.0.3 (#8030)

Bumps [koa](https://github.com/koajs/koa) from 3.0.1 to 3.0.3.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](koajs/koa@v3.0.1...v3.0.3)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 3.0.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

yarn.lock

@@ -4921,9 +4921,9 @@ koa-static@^5.0.0:
     koa-send "^5.0.0"
 
 koa@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-3.0.1.tgz#b211a0f350d1cc6185047671f8ef7e019c16351d"
-  integrity sha512-oDxVkRwPOHhGlxKIDiDB2h+/l05QPtefD7nSqRgDfZt8P+QVYFWjfeK8jANf5O2YXjk8egd7KntvXKYx82wOag==
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-3.0.3.tgz#40a97b6da0c0d49a704af82db2b3e5a618ed9042"
+  integrity sha512-MeuwbCoN1daWS32/Ni5qkzmrOtQO2qrnfdxDHjrm6s4b59yG4nexAJ0pTEFyzjLp0pBVO80CZp0vW8Ze30Ebow==
   dependencies:
     accepts "^1.3.8"
     content-disposition "~0.5.4"