revert since cli has been updated

Co-authored-by: Alessio Buccino <alejoe9187@gmail.com>

Author: zm711

src/MEArec/generators/recordinggenerator.py

@@ -1410,7 +1410,7 @@ def generate_recordings(
 
             # compute pad samples as 3 times the low-cutoff period
             if cutoff.size == 1:
-                pad_samples_filt = 3 * int((1.0 / cutoff * fs).magnitude[0])
+                pad_samples_filt = 3 * int((1.0 / cutoff * fs).magnitude)
             elif cutoff.size == 2:
                 pad_samples_filt = 3 * int((1.0 / cutoff[0] * fs).magnitude)