Update inkscape command

vendor/registrasion/registrasion/views.py

@@ -1202,8 +1202,9 @@ def _convert_img(img, outformat="png", dpi=300, width=None):
         # Inkscape results in nicer pdf render, embedding fonts etc where possible
         conversion_cmdline = [
             'inkscape',
-            '-f', '/dev/stdin',
-            '-A', '/dev/stdout',
+            '--pipe',
+            '--export-type=pdf',
+            '--export-filename=-',
             '-d', str(dpi)
         ]