Update Example_for_Modify_the_Config_File.md
Update Example_for_Modify_the_Config_File.md

remove an unexpected colon.
btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool