build(deps-dev): Bump webpack in /packages/epk-signature

Bumps [webpack](https://github.com/webpack/webpack) from 5.94.0 to 5.104.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Changelog](https://github.com/webpack/webpack/blob/main/CHANGELOG.md)
- [Commits](webpack/webpack@v5.94.0...v5.104.1)

---
updated-dependencies:
- dependency-name: webpack
  dependency-version: 5.104.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

packages/epk-signature/package.json

@@ -60,7 +60,7 @@
     "ts-loader": "8.4.0",
     "ts-node": "10.9.1",
     "typescript": "5.8.3",
-    "webpack": "5.94.0",
+    "webpack": "5.104.1",
     "webpack-bundle-analyzer": "4.2.0",
     "webpack-cli": "3.3.12"
   },