fix: Typo in debug message (#892)

Author: LecrisUT

Diff for: src/scikit_build_core/builder/builder.py

@@ -136,7 +136,7 @@ def configure(
         logger.debug("SITE_PACKAGES: {}", site_packages)
         if site_packages != DIR.parent.parent:
             self.config.prefix_dirs.append(DIR.parent.parent)
-            logger.debug("Extra SITE_PACKAGES: {}", site_packages)
+            logger.debug("Extra SITE_PACKAGES: {}", DIR.parent.parent)
 
         # Add the FindPython backport if needed
         if self.config.cmake.version < self.settings.backport.find_python: