chore(deps): 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:production
...

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

Author: dependabot[bot]

package.json

@@ -137,7 +137,7 @@
     "buffer": "^6.0.3",
     "electron-updater": "6.3.9",
     "js-yaml": "^4.1.0",
-    "koa": "^2.15.3",
+    "koa": "^2.15.4",
     "koa-static": "^5.0.0",
     "mri": "^1.2.0",
     "process": "^0.11.10",

yarn.lock

@@ -4222,7 +4222,7 @@ __metadata:
     glob: "npm:^11.0.0"
     html-webpack-plugin: "npm:^5.6.2"
     js-yaml: "npm:^4.1.0"
-    koa: "npm:^2.15.3"
+    koa: "npm:^2.15.4"
     koa-static: "npm:^5.0.0"
     less: "npm:^4.2.0"
     less-loader: "npm:^12.2.0"
@@ -8824,9 +8824,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"koa@npm:^2.15.3":
-  version: 2.15.3
-  resolution: "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"
@@ -8851,7 +8851,7 @@ __metadata:
     statuses: "npm:^1.5.0"
     type-is: "npm:^1.6.16"
     vary: "npm:^1.1.2"
-  checksum: 10/b2c2771a4ee5268f9d039ce025b9c3798a0baba8c3cf3895a6fc2d286363e0cd2c98c02a5b87f14100baa2bc17d854eed6ed80f9bd41afda1d056f803b206514
+  checksum: 10/98de77173822f0a28c0f5d1ebd261ab02f3f905d40602e51957a0c7202122647a60c5b6c59be03361dd24bf6a5685eac97af84b306914efd057751e71f93cb0f
   languageName: node
   linkType: hard