evdevd: fix stale error string (reads consumer_raw)

Read-error message still named /scheme/input/consumer after the switch to the
raw tap; correct it to consumer_raw. No behaviour change.

local/recipes/system/evdevd/source/src/main.rs

@@ -103,7 +103,9 @@ impl InputConsumer {
                     }
                 }
                 Err(err) if err.kind() == ErrorKind::WouldBlock => break,
-                Err(err) => return Err(format!("failed to read /scheme/input/consumer: {err}")),
+                Err(err) => {
+                    return Err(format!("failed to read /scheme/input/consumer_raw: {err}"))
+                }
             }
         }