Safer way to create directory
Safer way to create directory

This avoids errors in CI if the public/system directory doesn't exist yet.

WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,alpha721/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,sejalkhatri/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,alpha721/WikiEduDashboard,KarmaHater/WikiEduDashboard,alpha721/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,majakomel/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,KarmaHater/WikiEduDashboard,majakomel/WikiEduDashboard,sejalkhatri/WikiEduDashboard,majakomel/WikiEduDashboard,majakomel/WikiEduDashboard