Update weed/s3api/s3api_object_handlers_copy_test.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/s3api/s3api_object_handlers_copy_test.go

@@ -613,10 +613,7 @@ func TestCopyVersioningIntegration(t *testing.T) {
 			}
 
 			// Test metadata cleanup using production function
-			metadata := make(map[string][]byte)
-			for k, v := range tc.sourceMetadata {
-				metadata[k] = v
-			}
+			metadata := maps.Clone(tc.sourceMetadata)
 
 			if !shouldCreateVersion {
 				cleanupVersioningMetadata(metadata)