clarified comment

Author: LumePart

sample.env

@@ -31,7 +31,7 @@ LIBRARY_NAME=
 # DOWNLOAD_DIR=/path/to/musiclibrary/explo/
 # Download/move tracks to a subdirectory named after the playlist
 # USE_SUBDIRECTORY=true
-# Keep original file permissions (set to false on Synology devices)
+# Keep original file permissions when moving files (set to false on Synology devices)
 # KEEP_PERMISSIONS=true
 # Comma-separated list (no spaces) of download services, in priority order (default: youtube)
 # DOWNLOAD_SERVICES=youtube