fix(deps): update dependency @nextcloud/files to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -51,7 +51,7 @@
     "@nextcloud/cdav-library": "^2.5.0",
     "@nextcloud/dialogs": "^7.3.0",
     "@nextcloud/event-bus": "^3.3.3",
-    "@nextcloud/files": "^3.12.2",
+    "@nextcloud/files": "^4.0.0",
     "@nextcloud/initial-state": "^3.0.0",
     "@nextcloud/l10n": "3.4.1",
     "@nextcloud/logger": "^3.0.3",