[subcategory] improve README.md syntax for github
[subcategory] improve README.md syntax for github

MarkusH/pelican-plugins,xsteadfastx/pelican-plugins,benjaminabel/pelican-plugins,talha131/pelican-plugins,talha131/pelican-plugins,benjaminabel/pelican-plugins,xsteadfastx/pelican-plugins,rlaboiss/pelican-plugins,howthebodyworks/pelican-plugins,mortada/pelican-plugins,danmackinlay/pelican-plugins,mikitex70/pelican-plugins,howthebodyworks/pelican-plugins,UHBiocomputation/pelican-plugins,UHBiocomputation/pelican-plugins,rlaboiss/pelican-plugins,wilsonfreitas/pelican-plugins,rlaboiss/pelican-plugins,mortada/pelican-plugins,talha131/pelican-plugins,talha131/pelican-plugins,mikitex70/pelican-plugins,MarkusH/pelican-plugins,danmackinlay/pelican-plugins,MarkusH/pelican-plugins,wilsonfreitas/pelican-plugins,danmackinlay/pelican-plugins,benjaminabel/pelican-plugins,howthebodyworks/pelican-plugins,mortada/pelican-plugins,wilsonfreitas/pelican-plugins,howthebodyworks/pelican-plugins,MarkusH/pelican-plugins,xsteadfastx/pelican-plugins,UHBiocomputation/pelican-plugins,xsteadfastx/pelican-plugins,danmackinlay/pelican-plugins,mortada/pelican-plugins,mikitex70/pelican-plugins,rlaboiss/pelican-plugins,UHBiocomputation/pelican-plugins,mortada/pelican-plugins,talha131/pelican-plugins,wilsonfreitas/pelican-plugins,benjaminabel/pelican-plugins,MarkusH/pelican-plugins,mikitex70/pelican-plugins