I have moved code UpdateForm1() to Create() method and move UpdateForm2() to UpdateForm1() and update the table Orchard_Framework_DataMigrationRecord currnet module entry. I have done version -1 of current version(CModule.SM.Migrations = 1 instead of CModule.SM.Migrations = 2).
And then run project again. Update link appear in module list. Then disable and enable module. Module will be updated.