[documentation/gcompris-teachers-handbook] doc: update binary bulbs activity to have the same name as in GCompris

Git commit 50db441c7d1cb88d2c518596ad7134ddf7fb6e8c by Johnny Jazeix.
Committed on 16/12/2025 at 14:58.
Pushed by jjazeix into branch 'master'.

update binary bulbs activity to have the same name as in GCompris

M  +1    -1    doc/index.docbook

https://invent.kde.org/documentation/gcompris-teachers-handbook/-/commit/50db441c7d1cb88d2c518596ad7134ddf7fb6e8c

diff --git a/doc/index.docbook b/doc/index.docbook
index 999ca1c..64ad734 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -476,7 +476,7 @@ GCompris is a multi-activity educational software. This documentation is for the
       <ulink  url="https://invent.kde.org/education/gcompris/-/wikis/Teacher-administration-tool#supported-activities"/>
     </para>
     <para>
-      Here is an example for the <quote>Binary Bulb</quote> activity. The
+      Here is an example for the <quote>Binary bulbs</quote> activity. The
       common part of all activity editors contains fields to enter the dataset name,
       the goal and the difficulty. Then, each activity will have a
       specific editor. <mediaobject>