updated external flag on volumes after the migration from original racknerd VPS

vaultwarden/docker-compose.yml

@@ -19,3 +19,4 @@ services:
 volumes:
   vaultwarden_data:
     name: vaultwarden_data
+    external: true

wiki/docker-compose.yml

@@ -27,5 +27,7 @@ services:
     labels:
       - diun.enable=true
 volumes:
-  db-data: null
+  db-data:
+    name: wiki_db-data
+    external: true
 networks: {}