Update mysql Docker tag to v9

Author: renovate[bot]

sample/Docker/docker-compose.yml

@@ -2,7 +2,7 @@ version: '3.1'
 
 services:
   mysql:
-    image: mysql:5.7
+    image: mysql:9.7
     container_name: mysql-5.7
     ports:
       - "3307:3306"