Fix more typos
Fix more typos

Methos parameter is named img_url, but then is used as image_url, making loading images impossible.
dompdf/dompdf,nathanntg/dompdf,BrunoDeBarros/dompdf,edge-soft/dompdf,BrunoDeBarros/dompdf,nathanntg/dompdf,dompdf/dompdf,edge-soft/dompdf