[education/kstars] doc: Fix year

[Yuri Chornoivan]

Git commit c711bd8cd41197a70b121bf9194ddd7915500fda by Yuri Chornoivan.
Committed on 23/04/2021 at 07:03.
Pushed by yurchor into branch 'master'.

Fix year

M  +1    -1    doc/index.docbook

https://invent.kde.org/education/kstars/commit/c711bd8cd41197a70b121bf9194ddd7915500fda

diff --git a/doc/index.docbook b/doc/index.docbook
index 575fbf148..f4ea277a9 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -216,7 +216,7 @@
 
 <legalnotice>&FDLNotice;</legalnotice>
 
-<date>2022-04-26</date>
+<date>2021-04-26</date>
 <releaseinfo>3.5.3</releaseinfo>
 
 <abstract>