Adjust x-axis to start at 1 for custom phantompeakqualtools NSC plot

[pontushojer]

Description of feature

The minimal value for the NSC coeff is 1¹ so the x-axis should be adjusted to start at 1 for custom NSC plot to make it more informative.

Software versions
Nextflow: 24.04.1
nf-core/chipseq: v2.1.0
phantompeakqualtools: 1.2.2

Footnotes

1. https://hbctraining.github.io/In-depth-NGS-Data-Analysis-Course/sessionV/lessons/CC_metrics_extra.html ↩