[LyX/master] DocBook: fix a test to ensure that the DocBook document is valid.

[Thibaut Cuvelier]

commit e7ed8213ac47f52471130687613d5c15e3d0a023
Author: Thibaut Cuvelier <tcuvelier at lyx.org>
Date:   Sun Apr 3 03:41:02 2022 +0200

    DocBook: fix a test to ensure that the DocBook document is valid.
    
    A book cannot directly contain paragraphs, they must be within a chapter.
---
 autotests/export/xhtml/table_borders.lyx |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/autotests/export/xhtml/table_borders.lyx b/autotests/export/xhtml/table_borders.lyx
index 7b59f5f..76bfe2c 100644
--- a/autotests/export/xhtml/table_borders.lyx
+++ b/autotests/export/xhtml/table_borders.lyx
@@ -101,6 +101,10 @@
 Check HTML export
 \end_layout
 
+\begin_layout Chapter
+Some borders are bolder than others
+\end_layout
+
 \begin_layout Standard
 \begin_inset Tabular
 <lyxtabular version="3" rows="4" columns="3">