[LyX/master] ePub: update doc for running script.

[Thibaut Cuvelier]

commit a8853743c5676a142a62f8a790a7c1c66aa89b09
Author: Thibaut Cuvelier <tcuvelier at lyx.org>
Date:   Sun Feb 7 06:32:46 2021 +0100

    ePub: update doc for running script.
---
 lib/scripts/docbook2epub.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/scripts/docbook2epub.py b/lib/scripts/docbook2epub.py
index 8331f61..da2fbf9 100644
--- a/lib/scripts/docbook2epub.py
+++ b/lib/scripts/docbook2epub.py
@@ -9,7 +9,7 @@
 # Full author contact details are available in file CREDITS
 
 # Usage:
-#   python docbook2epub.py in.docbook out.epub
+#   python docbook2epub.py java_binary in.docbook out.epub
 
 from __future__ import print_function