Bump webdav from 4.6.0 to 4.8.0

Bumps [webdav](https://github.com/perry-mitchell/webdav-client) from 4.6.0 to 4.8.0.
- [Release notes](https://github.com/perry-mitchell/webdav-client/releases)
- [Changelog](https://github.com/perry-mitchell/webdav-client/blob/master/CHANGELOG.md)
- [Commits](perry-mitchell/webdav-client@v4.6.0...v4.8.0)

---
updated-dependencies:
- dependency-name: webdav
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

packages/web-runtime/package.json

@@ -51,7 +51,7 @@
     "vuex-persist": "3.1.3",
     "vuex-router-sync": "^5.0.0",
     "web-pkg": "*",
-    "webdav": "4.6.0",
+    "webdav": "4.8.0",
     "webfontloader": "^1.6.28",
     "xml-js": "^1.6.11"
   },