std/builtin: fix documentation of the cmplx function

Author: mertcandav

std/builtin.jule

@@ -228,4 +228,4 @@ fn imag(c: Cmplx): Float
 // The real and imaginary parts must be of the same size,
 // either f32 or f64 (or assignable to them), and the return
 // value will be the corresponding complex type (cmplx64 for f32, cmplx128 for f64).
-fn complex(r: Float, i: Float): Cmplx
+fn cmplx(r: Float, i: Float): Cmplx