vmm: Fix clippy: useless_borrows_in_formatting

Replace & in formatting arguments where it is already a reference
(avoiding &&).

Signed-off-by: Rob Bradford <rbradford@meta.com>

vmm/src/vm.rs

@@ -588,7 +588,7 @@ impl Vm {
             .validate()
             .map_err(Error::ConfigValidation)?;
 
-        info!("Booting VM from config: {:?}", &config);
+        info!("Booting VM from config: {:?}", config);
 
         // Create NUMA nodes based on NumaConfig.
         let numa_nodes =