Bump postcss and vue-loader in /web

Bumps [postcss](https://github.com/postcss/postcss) to 8.4.38 and updates ancestor dependency [vue-loader](https://github.com/vuejs/vue-loader). These dependencies need to be updated together.


Updates `postcss` from 7.0.39 to 8.4.38
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@7.0.39...8.4.38)

Updates `vue-loader` from 15.11.1 to 17.4.2
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/main/CHANGELOG.md)
- [Commits](vuejs/vue-loader@v15.11.1...v17.4.2)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
- dependency-name: vue-loader
  dependency-type: direct:development
...

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

Author: dependabot[bot]

web/package-lock.json

@@ -43,7 +43,7 @@
     "terser-webpack-plugin": "^5.3.10",
     "typescript": "^5.4.5",
     "typescript-eslint": "8.0.0-alpha.14",
-    "vue-loader": "^15.11.1",
+    "vue-loader": "^17.4.2",
     "vue-template-compiler": "^2.7.16",
     "webpack": "^5.91.0",
     "webpack-cli": "^5.1.4",