Be more specific in comment

Co-authored-by: Ondrej Baranovič <[email protected]>

setup.py

@@ -691,7 +691,7 @@ def build_extensions(self) -> None:
                 elif sys.platform == "win32" and _find_library_file(self, "zlib"):
                     feature.set("zlib", "zlib")  # alternative name
                 elif sys.platform == "win32" and _find_library_file(self, "zdll"):
-                    feature.set("zlib", "zdll")  # different name if shared
+                    feature.set("zlib", "zdll")  # dll import library
 
         if feature.want("jpeg"):
             _dbg("Looking for jpeg")