Bump ts-loader from 9.5.2 to 9.5.4 in /frontend

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 9.5.2 to 9.5.4.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/main/CHANGELOG.md)
- [Commits](https://github.com/TypeStrong/ts-loader/compare/v9.5.2...v9.5.4)

---
updated-dependencies:
- dependency-name: ts-loader
  dependency-version: 9.5.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

frontend/obsidian-plugin/package.json

@@ -26,7 +26,7 @@
         "sass-loader": "^16.0.5",
         "sync-client": "file:../sync-client",
         "terser-webpack-plugin": "^5.3.14",
-        "ts-loader": "^9.5.2",
+        "ts-loader": "^9.5.4",
         "tslib": "2.8.1",
         "tsx": "^4.20.5",
         "typescript": "5.8.3",