feat: modify the name of an operator #918 (#1333)

### What problem does this PR solve?

feat: modify the name of an operator #918

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/mock.tsx

@@ -45,6 +45,7 @@ export const dsl = {
         },
         data: {
           label: 'Begin',
+          name: 'begin',
         },
         sourcePosition: 'left',
         targetPosition: 'right',