Update library/std/src/sys/pal/wasi/env.rs

apply 2nd suggestion

Co-authored-by: Trevor Gross <[email protected]>

Author: g0djan

library/std/src/sys/pal/wasi/env.rs

@@ -1,4 +1,5 @@
 #![forbid(unsafe_op_in_unsafe_fn)]
+
 pub mod os {
     pub const FAMILY: &str = "";
     pub const OS: &str = "";