Correct LSTR0Corrections cards for calibration script

[FrancaCassol]

Keep default trailets values for the selection of the R0 waveform samples to be used for the R1 waveform. Before the firmware upgrade of November, values were
"r1_sample_start": 2,
"r1_sample_end": 38

After, they should be:
"r1_sample_start": 3,
"r1_sample_end": 39

A test did not show major changes in the calibration results

[codecov]

Codecov Report

Merging #432 into master will increase coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #432      +/-   ##
==========================================
+ Coverage   41.56%   41.74%   +0.17%     
==========================================
  Files          76       77       +1     
  Lines        6192     6211      +19     
==========================================
+ Hits         2574     2593      +19     
  Misses       3618     3618              

Impacted Files	Coverage Δ
lstchain/visualization/plot_drs4.py	0.00% <ø> (ø)
lstchain/reco/tests/test_r0_to_dl1.py	100.00% <0.00%> (ø)
lstchain/reco/r0_to_dl1.py	64.48% <0.00%> (+0.27%)	⬆️
lstchain/calib/camera/calibration_calculator.py	27.39% <0.00%> (+0.37%)	⬆️

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[morcuended]

I realized that the old values are still in some notebooks and in this visualization script, cta-lstchain/lstchain/visualization/plot_drs4.py

# r0 calibrator
r0_calib = LSTR0Corrections(pedestal_path=pedestal_file, offset=offset_value,
                            r1_sample_start=2, r1_sample_end=38, tel_id=tel_id )

[rlopezcoto]

@FrancaCassol can you change the default values @morcuended found in the visualization scripts? We can merge afterwards