disable ssl for mysql client due to Github Actions limited ssl support (#300)

diff --git a/dubbo-samples-transaction/src/main/resources/jdbc.properties b/dubbo-samples-transaction/src/main/resources/jdbc.properties
index a0b5b85..463ad10 100644
--- a/dubbo-samples-transaction/src/main/resources/jdbc.properties
+++ b/dubbo-samples-transaction/src/main/resources/jdbc.properties
@@ -13,17 +13,17 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
-jdbc.account.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo
+jdbc.account.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo?useSSL=false
 jdbc.account.username=root
 jdbc.account.password=helloworld
 jdbc.account.driver=com.mysql.jdbc.Driver
 # storage db config
-jdbc.storage.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo
+jdbc.storage.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo?useSSL=false
 jdbc.storage.username=root
 jdbc.storage.password=helloworld
 jdbc.storage.driver=com.mysql.jdbc.Driver
 # order db config
-jdbc.order.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo
+jdbc.order.url=jdbc:mysql://${mysql.address:127.0.0.1}:${mysql.port:3306}/seata-demo?useSSL=false
 jdbc.order.username=root
 jdbc.order.password=helloworld
 jdbc.order.driver=com.mysql.jdbc.Driver