Fix docstring for docs CI

Author: jlenain

src/nectarchain/makers/calibration/pedestal_makers.py

@@ -33,10 +33,11 @@ def __init__(self, *args, **kwargs):
     @staticmethod
     def mean_std_multisample(nevents, means, stds):
         """
-        Method that calculates means and std of the combination of multiple subsamples
-            Works for both:
-        - pedestal data (means/stds shaped (n_pixels, n_samples))
-        - charge data (means/stds shaped (n_pixels,))
+        Method that calculates means and std of the combination of multiple subsamples.
+        Works for both:
+
+            - pedestal data (means/stds shaped (n_pixels, n_samples))
+            - charge data (means/stds shaped (n_pixels,))
 
         Parameters
         ----------