docs: Use the right python

diff --git a/docs/reference/gtk/gtk-markdown-to-docbook b/docs/reference/gtk/gtk-markdown-to-docbook
index 5830d64d78974ae488c9eb06cbbf3362e9982b91..f48b556f48e6430c794844c3dccc20cd4afdeb62 100755 (executable)
--- a/docs/reference/gtk/gtk-markdown-to-docbook
+++ b/docs/reference/gtk/gtk-markdown-to-docbook
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Call pandoc to convert markdown to docbook, then expand gtk-doc
 # abbreviations (|[ ]|, function(), #object, %constant, etc)