fix: update displaydoc proc-macro attributes

With the update to v1.0.0, the proc macro syntax for deriving `Display`
has changed, causing compilation failures.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

src/vmm/src/cpu_config/x86_64/static_cpu_templates/mod.rs

@@ -20,23 +20,23 @@ pub mod t2s;
 #[derive(Debug, Default, Display, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub enum StaticCpuTemplate {
     /// C3 Template.
-    #[display(fmt = "C3")]
+    #[display("C3")]
     C3,
     /// T2 Template.
-    #[display(fmt = "T2")]
+    #[display("T2")]
     T2,
     /// T2S Template.
-    #[display(fmt = "T2S")]
+    #[display("T2S")]
     T2S,
     /// No CPU template is used.
     #[default]
-    #[display(fmt = "None")]
+    #[display("None")]
     None,
     /// T2CL Template.
-    #[display(fmt = "T2CL")]
+    #[display("T2CL")]
     T2CL,
     /// T2A Template.
-    #[display(fmt = "T2A")]
+    #[display("T2A")]
     T2A,
 }