Judging from the media reports, no.
It seems that they were boarding from an airbridge. Click on this link and the white line shows that the aircraft was parked right next to the terminal building on an airbridge stand.
Flightradar24.com - Live flight tracker!
They would have used the airbridge as I have never seen an aircraft board via steps on these stands. Believe it or not even Ryanair 95% of the time always use them. (Which I wonder why they were complaining about using them at Alicante but not Malaga).