Enable clippy::suspicious_to_owned (#9004)

Another small change: calling to owned on the `Cow` was cloning the
`Cow`, not its contents and so calling `clone` makes this more explicit

crates/workspace/src/workspace.rs

@@ -224,7 +224,7 @@ impl Clone for Toast {
     fn clone(&self) -> Self {
         Toast {
             id: self.id,
-            msg: self.msg.to_owned(),
+            msg: self.msg.clone(),
             on_click: self.on_click.clone(),
         }
     }