fix(deps): update dependency @nextcloud/auth to ^2.6.0

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

Author: renovate[bot]

package-lock.json

@@ -44,7 +44,7 @@
   "dependencies": {
     "@mattkrick/sanitize-svg": "^0.4.1",
     "@mdi/svg": "^7.4.47",
-    "@nextcloud/auth": "^2.5.3",
+    "@nextcloud/auth": "^2.6.0",
     "@nextcloud/axios": "^2.5.2",
     "@nextcloud/browser-storage": "^0.5.0",
     "@nextcloud/capabilities": "^1.2.1",