[education/kstars] doc: Fix handbook authors section

[Hy Murveit]

Git commit e576820dd5e875885f9f05a9785f36bfd3cc2867 by Hy Murveit.
Committed on 08/12/2023 at 00:34.
Pushed by murveit into branch 'master'.

Fix handbook authors section

Somehow my last change lost all the authors in the handbook. Trying this.

M  +2    -2    doc/index.docbook

https://invent.kde.org/education/kstars/-/commit/e576820dd5e875885f9f05a9785f36bfd3cc2867

diff --git a/doc/index.docbook b/doc/index.docbook
index 6b7efa7144..f5914123d0 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -89,14 +89,14 @@
 
 <authorgroup>
 
-<othercredit role="developer">
+<author>
 <firstname>Jasem</firstname>
 <surname>Mutlaq</surname>
 <affiliation>
 <address>&Jasem.Mutlaq.mail;</address>
 </affiliation>
 <contrib>Lead Developer & Maintainer</contrib>
-</othercredit>
+</author>
 
 <othercredit role="developer">
 <firstname>Jason</firstname>