Update mysql Docker tag to v9.7.0

Author: renovate[bot]

stacks/mysql.Dockerfile

@@ -1,7 +1,7 @@
 # How to use:
 # 1. Build the image: docker build -f mysql.Dockerfile --tag 'bin_mysql' .
 # 2. Run the container: docker run --name alala -e MYSQL_ROOT_PASSWORD=<some password> -p 3306:3306 -d bin_mysql
-FROM mysql:9.6.0@sha256:c5df04bee1a42b74a5841c6409e669cf62126cd0416f00c1cea8ab933b9361b9
+FROM mysql:9.7.0@sha256:c9e48b0c008f1936d4139d1c0dcd5950a9dbe57d4d40f383013cde432fa6d6aa
 
 # Copy the sample configuration file into the container
 COPY stacks/mysql/my.cnf.sample /etc/mysql/my.cnf