style: apply clippy suggestion

Author: o087D

testcontainers/src/runners/async_runner.rs

@@ -290,7 +290,7 @@ where
         }?;
 
         let copy_to_sources: Vec<&CopyToContainer> =
-            container_req.copy_to_sources().map(Into::into).collect();
+            container_req.copy_to_sources().collect();
 
         for copy_to_source in copy_to_sources {
             client