Update docs/source/install.rst
Update docs/source/install.rst

Co-authored-by: Oscar Esteban <e6fb06210fafc02fd7479ddbed2d042cc3a5155e@oscaresteban.es>
oesteban/mriqc,oesteban/mriqc,poldracklab/mriqc,poldracklab/mriqc,oesteban/mriqc,oesteban/mriqc,poldracklab/mriqc,poldracklab/mriqc