Fix serde rename of PanicStrategy

Author: saethlin

src/cargo/core/profiles.rs

@@ -873,7 +873,7 @@ impl serde::ser::Serialize for Lto {
 
 /// The `panic` setting.
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Hash, PartialOrd, Ord, serde::Serialize)]
-#[serde(rename_all = "lowercase")]
+#[serde(rename_all = "kebab-case")]
 pub enum PanicStrategy {
     Unwind,
     Abort,