fix(eeg_ds003645s_hed_demo): Fix value column for first event

Author: effigies

eeg_ds003645s_hed_demo/sub-004/ses-1/eeg/sub-004_ses-1_task-FacePerception_run-1_events.tsv

@@ -1,5 +1,5 @@
 onset	duration	event_type	face_type	rep_status	rep_lag	trial	value	stim_file
-24.26672727	n/a	show_face_initial	scrambled_face	first_show	n/a	1	4	s107.bmp
+24.26672727	n/a	show_face_initial	scrambled_face	first_show	n/a	1	17	s107.bmp
 25.11309091	n/a	show_circle	n/a	n/a	n/a	1	0	circle.bmp
 25.28036364	n/a	right_press	n/a	n/a	n/a	1	4096	n/a
 26.81309091	n/a	show_cross	n/a	n/a	n/a	2	1	cross.bmp