chore(deps-dev): 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: direct:development
...

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

Author: dependabot[bot]

packages/platform/platform-koa/package.json

@@ -75,7 +75,7 @@
     "@types/koa-session": "6.4.5",
     "@types/koa__router": "12.0.4",
     "eslint": "9.12.0",
-    "koa": "2.15.3",
+    "koa": "2.15.4",
     "koa-bodyparser": "4.4.1",
     "koa-compress": "5.1.1",
     "koa-override": "4.0.0",

yarn.lock

@@ -7841,7 +7841,7 @@ __metadata:
     "@types/koa__router": "npm:12.0.4"
     encodeurl: "npm:^2.0.0"
     eslint: "npm:9.12.0"
-    koa: "npm:2.15.3"
+    koa: "npm:2.15.4"
     koa-bodyparser: "npm:4.4.1"
     koa-compress: "npm:5.1.1"
     koa-override: "npm:4.0.0"
@@ -20202,7 +20202,38 @@ __metadata:
   languageName: node
   linkType: hard
 
-"koa@npm:2.15.3, koa@npm:^2.15.3":
+"koa@npm:2.15.4":
+  version: 2.15.4
+  resolution: "koa@npm:2.15.4"
+  dependencies:
+    accepts: "npm:^1.3.5"
+    cache-content-type: "npm:^1.0.0"
+    content-disposition: "npm:~0.5.2"
+    content-type: "npm:^1.0.4"
+    cookies: "npm:~0.9.0"
+    debug: "npm:^4.3.2"
+    delegates: "npm:^1.0.0"
+    depd: "npm:^2.0.0"
+    destroy: "npm:^1.0.4"
+    encodeurl: "npm:^1.0.2"
+    escape-html: "npm:^1.0.3"
+    fresh: "npm:~0.5.2"
+    http-assert: "npm:^1.3.0"
+    http-errors: "npm:^1.6.3"
+    is-generator-function: "npm:^1.0.7"
+    koa-compose: "npm:^4.1.0"
+    koa-convert: "npm:^2.0.0"
+    on-finished: "npm:^2.3.0"
+    only: "npm:~0.0.2"
+    parseurl: "npm:^1.3.2"
+    statuses: "npm:^1.5.0"
+    type-is: "npm:^1.6.16"
+    vary: "npm:^1.1.2"
+  checksum: 10/98de77173822f0a28c0f5d1ebd261ab02f3f905d40602e51957a0c7202122647a60c5b6c59be03361dd24bf6a5685eac97af84b306914efd057751e71f93cb0f
+  languageName: node
+  linkType: hard
+
+"koa@npm:^2.15.3":
   version: 2.15.3
   resolution: "koa@npm:2.15.3"
   dependencies: