small update of Japanese info text of exec node
small update of Japanese info text of exec node

HiroyasuNishiyama/node-red,node-red/node-red,mw75/node-red,node-red/node-red,HiroyasuNishiyama/node-red,btsimonh/node-red,mw75/node-red,mw75/node-red,mw75/node-red,btsimonh/node-red,btsimonh/node-red,node-red/node-red,HiroyasuNishiyama/node-red,namgk/node-red,namgk/node-red