chore: rename uid to user column in ls --long (#9407)

Fixes: #9389

crates/nu-command/src/filesystem/ls.rs

@@ -506,7 +506,7 @@ pub(crate) fn dir_entry_dict(
                     span,
                 });
 
-                cols.push("uid".into());
+                cols.push("user".into());
                 if let Some(user) = users::get_user_by_uid(md.uid()) {
                     vals.push(Value::String {
                         val: user.name().to_string_lossy().into(),

crates/nu-command/tests/commands/ls.rs

@@ -363,7 +363,7 @@ fn list_all_columns() {
                     "mode",
                     "num_links",
                     "inode",
-                    "uid",
+                    "user",
                     "group",
                     "size",
                     "created",