Update README.md

The number of columns are 64,791

README.md

@@ -10,8 +10,8 @@ Supporting dataset for paper https://arxiv.org/abs/2306.00455
 The dataset contains 140,000 records from 128 EEG channels, each of 2 seconds, recorded at 250hz, in total 17,920,000 brain signals and 8,960,000,000 data points.
 
 It consists of 2 main csv data files:
-- “train.csv” 45Gb Header + 120,000 rows 63,790 columns
-- “test.csv” 7,52Gb Header + 20,000 rows 63,790 columns
+- “train.csv” 45Gb Header + 120,000 rows 64,791 columns
+- “test.csv” 7,52Gb Header + 20,000 rows 64,791 columns
 
 10 audio files at a folder named “audiolabels”: “0.wav”, “1.wav”......“9.wav”