Repeat comment for each unzip use

Co-authored-by: Neil Vaytet <[email protected]>

Author: jl-wynen

src/ess/reduce/data/_registry.py

@@ -253,6 +253,8 @@ def _local_path(self, name: str) -> Path:
 
     @property
     def _unzip_processor(self) -> Any:
+        # Create a new processor on demand because reusing the same processor would
+        # reuse the same output path for every file.
         return _import_pooch().Unzip(self._extract_dir)