Bump vue-loader from 16.7.0 to 16.8.1 in /Web

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 16.7.0 to 16.8.1.
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/master/CHANGELOG.md)
- [Commits](vuejs/vue-loader@v16.7.0...v16.8.1)

---
updated-dependencies:
- dependency-name: vue-loader
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Web/package.json

@@ -36,7 +36,7 @@
     "vue": "^2.6.14",
     "vue-hot-reload-api": "^2.3.4",
     "vue-html-loader": "^1.2.4",
-    "vue-loader": "^16.7.0",
+    "vue-loader": "^16.8.1",
     "vue-octicon": "^2.1.1",
     "vue-style-loader": "^4.1.3",
     "vue-template-compiler": "^2.6.14",