chore: use Cow instead of String for tooltips (#2838)

A QoL change to align `Tooltip` with other elements like `Label`
Release Notes:

- N/A

crates/feedback/src/deploy_feedback_button.rs

@@ -66,7 +66,7 @@ impl View for DeployFeedbackButton {
                 })
                 .with_tooltip::<Self>(
                     0,
-                    "Send Feedback".into(),
+                    "Send Feedback",
                     Some(Box::new(GiveFeedback)),
                     theme.tooltip.clone(),
                     cx,

crates/feedback/src/submit_feedback_button.rs

@@ -80,7 +80,7 @@ impl View for SubmitFeedbackButton {
         .with_margin_left(theme.feedback.button_margin)
         .with_tooltip::<Self>(
             0,
-            "cmd-s".into(),
+            "cmd-s",
             Some(Box::new(SubmitFeedback)),
             theme.tooltip.clone(),
             cx,