Update math/gf4096/gf4096.go

Co-authored-by: Armando Faz <armfazh@users.noreply.github.com>

Author: whyvl

math/gf4096/gf4096.go

@@ -78,6 +78,6 @@ func Inv(a Gf) Gf {
 }
 
 // Div calculates a / b
-func Div(b, a Gf) Gf {
+func Div(a, b Gf) Gf {
 	return Mul(Inv(b), a)
 }