Update neo/io/proxyobjects.py

Co-authored-by: Julia Sprenger <[email protected]>

Author: samuelgarcia

neo/io/proxyobjects.py

@@ -92,7 +92,7 @@ def __init__(self, rawio=None, stream_index=None, inner_stream_channels=None,
         # inner_stream_channels: are channel index inside the stream None means all channels
         # if inner_stream_channels is not None:
         #     * then this is a "substream"
-        #     * handle the case where channels have diffrents units inside a stream
+        #     * handle the case where channels have different units inside a stream
         #     * is related to BaseFromRaw.get_sub_signal_streams()
 
         self._rawio = rawio