naming fixed and yml file bug fixed

ShardingSphereMyBatisPlusMySQLMasterSlave/demo/src/main/resources/application.yml → ShardingSphereMyBatisPlusReadWriteSplitting/demo/src/main/resources/application.yml

 spring:
-  datasource:
-    url: jdbc:mysql://localhost:3306/test
-    username: root
-    password: 123456
   shardingsphere:
     datasource:
       names: master,slave
@@ -23,4 +19,4 @@ spring:
       slave-data-source-names: slave
     props:
       sql:
-        show: true
+        show: true
\ No newline at end of file