[LyX/master] Include docbook_copy.py in released tarball.

[Pavel Sanda]

commit 05dd6614c4e3984f2c1ace3b4a59e47421e13f06
Author: Pavel Sanda <sanda at lyx.org>
Date:   Mon Sep 27 22:07:07 2021 +0200

    Include docbook_copy.py in released tarball.
---
 lib/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 2d359e7..71cebde 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -2690,6 +2690,7 @@ dist_scripts_DATA += \
 	scripts/convert_pdf.py \
 	scripts/convertDefault.py \
 	scripts/csv2lyx.py \
+	scripts/docbook_copy.py \
 	scripts/ext_copy.py \
 	scripts/fen2ascii.py \
 	scripts/fig2pdftex.py \