[tellico] doc: doc: Write docbook date in standard format

[Alexander Potashev]

Git commit 0dac3293573fa76adebe5c28e47a789cd02f5623 by Alexander Potashev.
Committed on 18/06/2019 at 23:47.
Pushed by aspotashev into branch 'master'.

doc: Write docbook date in standard format

M  +1    -1    doc/index.docbook

https://commits.kde.org/tellico/0dac3293573fa76adebe5c28e47a789cd02f5623

diff --git a/doc/index.docbook b/doc/index.docbook
index 6f29d0ae..5ba79641 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -41,7 +41,7 @@ Change date/releaseinfo only if
 Don't forget to include this last date.
 Please respect the format of the date (YYYY-MM-DD),it is used by scripts.
 -->
-<date>2019/05/12</date>
+<date>2019-05-12</date>
 
 <!--version information of Frameworks/Plasma/Applications this documentation is valid for.
 Example: