[marytts] Fix stale MaryTTS project URL in NOTICE file (#21438)

* Initial plan

* Fix MaryTTS project URL in NOTICE file

Co-authored-by: lsiepel <13950897+lsiepel@users.noreply.github.com>

Author: Copilot

bundles/org.openhab.voice.marytts/NOTICE

@@ -16,5 +16,5 @@ https://github.com/openhab/openhab-addons
 
 marytts
 * License: LGPL v3.0 License
-* Project: http://mary.dfki.de
+* Project: https://mary.opendfki.de
 * Source:  https://github.com/marytts/marytts