Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: borchero

dataframely/config.py

@@ -59,7 +59,7 @@ def set_max_sampling_iterations(iterations: int) -> None:
     @staticmethod
     def restore_defaults() -> None:
         """Restore the defaults of the configuration."""
-        Config.options = _DEFAULT_OPTIONS
+        Config.options = _DEFAULT_OPTIONS.copy()
 
     # ------------------------------------ CONTEXT ----------------------------------- #