Bump koa from 2.15.3 to 2.15.4

Bumps [koa](https://github.com/koajs/koa) from 2.15.3 to 2.15.4.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/2.15.4/History.md)
- [Commits](koajs/koa@2.15.3...2.15.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

yarn.lock

@@ -7347,8 +7347,8 @@ __metadata:
   linkType: hard
 
 "koa@npm:^2.13.0":
-  version: 2.15.3
-  resolution: "koa@npm:2.15.3"
+  version: 2.15.4
+  resolution: "koa@npm:2.15.4"
   dependencies:
     accepts: ^1.3.5
     cache-content-type: ^1.0.0
@@ -7373,7 +7373,7 @@ __metadata:
     statuses: ^1.5.0
     type-is: ^1.6.16
     vary: ^1.1.2
-  checksum: 7c3537443b1a588cf5c3e5554b914ff2bad510323d22b41861d5e0c97d47e9c5997965f303ede8be8bd83d309a4eea1f82cd45d35d6838bc21bb1bb6a90d5d25
+  checksum: cd2bf396fa5f575504d4c1b9e23ba64b9c58cbfa8276dbc4d99ce527ae4f238c38eafb811c22986c2f0f475a61734d05a8f9f5873b22432d78344b4517d83a69
   languageName: node
   linkType: hard