minor terminology fix in User docs

oconnor663 · oconnor663 · commit 901857f85229 · 2022-08-11T17:43:48.000-07:00
Passwords are hashed, not encrypted.
diff --git a/src/unistd.rs b/src/unistd.rs
@@ -2937,7 +2937,7 @@ feature! {
 pub struct User {
     /// Username
     pub name: String,
-    /// User password (probably encrypted)
+    /// User password (probably hashed)
     pub passwd: CString,
     /// User ID
     pub uid: Uid,
