misc: Automatically fix cargo clippy issues added in 1.65 (stable)

The code of the stable branch diverges from the main branch, so we
can't directly backport the corresponding commit to fix the clippy
issues.

See: commit 5e52729453

Signed-off-by: Bo Chen <chen.bo@intel.com>

vhost_user_block/src/lib.rs

@@ -79,7 +79,7 @@ pub const SYNTAX: &str = "vhost-user-block backend parameters \
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "vhost_user_block_error: {:?}", self)
+        write!(f, "vhost_user_block_error: {self:?}")
     }
 }
 
@@ -504,7 +504,7 @@ pub fn start_block_backend(backend_command: &str) {
     let backend_config = match VhostUserBlkBackendConfig::parse(backend_command) {
         Ok(config) => config,
         Err(e) => {
-            println!("Failed parsing parameters {:?}", e);
+            println!("Failed parsing parameters {e:?}");
             process::exit(1);
         }
     };