Link to Discord instead of Slack in metainfo

launcher/eu.vcmi.VCMI.metainfo.xml

@@ -57,7 +57,7 @@
 	<url type="faq">https://vcmi.eu/faq/</url>
 	<url type="help">https://github.com/vcmi/vcmi/blob/master/docs/Readme.md</url>
 	<url type="translate">https://github.com/vcmi/vcmi/blob/master/docs/modders/Translations.md</url>
-	<url type="contact">https://slack.vcmi.eu/</url>
+	<url type="contact">https://discord.gg/chBT42V</url>
 	<url type="vcs-browser">https://github.com/vcmi/vcmi</url>
 	<recommends>
 		<control>keyboard</control>