Bump koa in /frontend in the npm_and_yarn group across 1 directory (#524)

Bumps the npm_and_yarn group with 1 update in the /frontend directory: [koa](https://github.com/koajs/koa).


Updates `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](https://github.com/koajs/koa/compare/2.15.3...2.15.4)

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

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

frontend/pnpm-lock.yaml

@@ -4027,8 +4027,8 @@ packages:
     resolution: {integrity: sha512-UqyYyH5YEXaJrf9S8E23GoJFQZXkBVJ9zYYMPGz919MSX1KuvAcycIuS0ci150HCoPf4XQVhQ84Qf8xRPWxFaQ==}
     engines: {node: '>= 7.6.0'}
 
-  koa@2.15.3:
-    resolution: {integrity: sha512-j/8tY9j5t+GVMLeioLaxweJiKUayFhlGqNTzf2ZGwL0ZCQijd2RLHK0SLW5Tsko8YyyqCZC2cojIb0/s62qTAg==}
+  koa@2.15.4:
+    resolution: {integrity: sha512-7fNBIdrU2PEgLljXoPWoyY4r1e+ToWCmzS/wwMPbUNs7X+5MMET1ObhJBlUkF5uZG9B6QhM2zS1TsH6adegkiQ==}
     engines: {node: ^4.8.4 || ^6.10.1 || ^7.10.1 || >= 8.1.4}
 
   kolorist@1.8.0:
@@ -10604,7 +10604,7 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  koa@2.15.3:
+  koa@2.15.4:
     dependencies:
       accepts: 1.3.8
       cache-content-type: 1.0.1
@@ -12242,7 +12242,7 @@ snapshots:
       '@koa/router': 12.0.2
       commander: 6.2.1
       fs-extra: 9.1.0
-      koa: 2.15.3
+      koa: 2.15.4
       koa-static: 5.0.0
       open: 7.4.2
       portfinder: 1.0.32