fix make_client template for windows

Author: ryan-surname-p

crates/wasm-pkg-client/tests/publish_semver_check.rs

@@ -45,7 +45,7 @@ default_registry = "local"
 type = "local"
 
 [registry."local".local]
-root = "{}"
+root = '{}'
 "#,
         root.display(),
     );