Resolve unknown method error for shell command

Author: rachelmcr

lib/fastlane/plugin/wpmreleasetoolkit/helper/promo_screenshots_helper.rb

@@ -234,7 +234,7 @@ def draw_text_to_canvas(canvas, text, width, height, x_position, y_position, fon
         begin
           tempTextFile = Tempfile.new()
 
-          sh('drawText', "html=\"#{text}\"", "maxWidth=#{width}", "maxHeight=#{height}", "output=\"#{tempTextFile.path}\"", "fontSize=#{font_size}", "stylesheet=\"#{stylesheet_path}\"", "alignment=\"#{position}\"")
+          Action.sh('drawText', "html=\"#{text}\"", "maxWidth=#{width}", "maxHeight=#{height}", "output=\"#{tempTextFile.path}\"", "fontSize=#{font_size}", "stylesheet=\"#{stylesheet_path}\"", "alignment=\"#{position}\"")
 
           text_content = open_image(tempTextFile.path).trim
           text_frame = create_image(width, height)