call Hasura.SetSourceName in Config.Substitute

to make sure Load() works as intended.

Author: 852Kerfunkle

config/config.go

@@ -21,6 +21,7 @@ type Config struct {
 
 // Substitute -
 func (c *Config) Substitute() error {
+	c.Hasura.SetSourceName()
 	return nil
 }