Use mysql 5.7 instead of 8

.github/workflows/ci.yml

@@ -26,9 +26,9 @@ jobs:
           - 6379/tcp
 
     steps:
-    - name: Setup MySQL latest
+    - name: Setup MySQL 5.7
       if: matrix.db-type == 'mysql' && matrix.php-version != '5.6'
-      run: docker run --rm --name=mysqld -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=cakephp -p 3306:3306 -d mysql --default-authentication-plugin=mysql_native_password --disable-log-bin
+      run: docker run --rm --name=mysqld -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=cakephp -p 3306:3306 -d mysql:5.7
 
     - name: Setup MySQL 5.6
       if: matrix.db-type == 'mysql' && matrix.php-version == '5.6'