ci: check mysql version

Signed-off-by: Agnes Lin <agneslin.lin@ibm.com>

.github/workflows/continuous-integration.yaml

@@ -52,7 +52,7 @@ jobs:
           while ! mysqladmin ping --host=127.0.0.1 --port 3000 --password=$MYSQL_ROOT_PASSWORD --silent < ./test/schema.sql; do
             sleep 1
           done
-          mysql -V
+          mysql -uroot -proot "SHOW DATABASES;"
       - name: npm install, build, and test
         run: |
           npm install