Update valkey stability tag to 0.4.0

Author: wodbot

.env

@@ -63,8 +63,8 @@ MARIADB_TAG=11.4-3.30.2
 
 ### --- VALKEY ---
 
-VALKEY_TAG=8-0.3.2
-#VALKEY_TAG=7-0.3.2
+VALKEY_TAG=8-0.4.0
+#VALKEY_TAG=7-0.4.0
 
 ### --- VARNISH ---
 

tests/.env

@@ -5,7 +5,7 @@ DB_HOST=postgres
 DB_ADAPTER=postgresql
 DB_ENGINE=django.db.backends.postgresql
 
-VALKEY_TAG=8-0.3.2
+VALKEY_TAG=8-0.4.0
 POSTGRES_TAG=17-1.35.1
 NGINX_TAG=1.26-5.39.13