fix(deps): update dependency webdav to ^5.9.0

Author: renovate[bot]

package-lock.json

@@ -99,7 +99,7 @@
     "vue": "^2.7.16",
     "vue-click-outside": "^1.1.0",
     "vue-material-design-icons": "^5.3.1",
-    "webdav": "^5.8.0",
+    "webdav": "^5.9.0",
     "y-prosemirror": "^1.3.7",
     "y-protocols": "^1.0.7",
     "yjs": "^13.6.29"