chore(deps): update nextcloud:31.0.5 docker digest to 21780a1

Author: renovate-bot-cbcoutinho[bot]

docker-compose.yml

@@ -21,7 +21,7 @@ services:
     restart: always
 
   app:
-    image: nextcloud:31.0.5@sha256:f43cee69f241e0fde517516f15af71ed1d60ac2774bf73d4aa5f2dcbd3802532
+    image: nextcloud:31.0.5@sha256:21780a19a2ce40e4983686da489212f351e2cbd593050d8206672fbfbebd4e51
     #user: www-data:www-data
     restart: always
     #post_start: