[system/ksystemlog] doc: Revert accidental change in docs

[Yuri Chornoivan]

Git commit 8b4f05c108a7f9870b48a0511249ccdea25f877f by Yuri Chornoivan.
Committed on 03/10/2021 at 05:25.
Pushed by yurchor into branch 'master'.

Revert accidental change in docs

M  +1    -1    doc/index.docbook

https://invent.kde.org/system/ksystemlog/commit/8b4f05c108a7f9870b48a0511249ccdea25f877f

diff --git a/doc/index.docbook b/doc/index.docbook
index 284de23..93e4be8 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -282,7 +282,7 @@ Hide menu entries and actions for modes with missing log files
 
 	<para>&ksystemlog;</para>
 	<para>
-	&ksystemlog;, SPDX-FileCopyrightText: 2008 Nicolas Ternisien
+	&ksystemlog;, Copyright 2008 by Nicolas Ternisien
 	</para>
 
 	<para>Contributors:</para>