chore(deps): update docker.io/passbolt/passbolt docker tag to v5.6.0

library/compose/passbolt/compose.yaml.j2

@@ -16,7 +16,7 @@ services:
     restart: unless-stopped
   passbolt:
     container_name: passbolt-app
-    image: docker.io/passbolt/passbolt:5.5.0-1-ce
+    image: docker.io/passbolt/passbolt:5.6.0-1-ce
     depends_on:
       - passbolt-db
     environment: