(owncloud-client) Fixed mailing list url and copyright

fixes #1502

automatic/owncloud-client/owncloud-client.nuspec

@@ -11,7 +11,7 @@
     <projectUrl>https://owncloud.org/</projectUrl>
     <projectSourceUrl>https://github.com/owncloud/client</projectSourceUrl>
     <bugTrackerUrl>https://github.com/owncloud/client/issues</bugTrackerUrl>
-    <mailingListUrl>https://mailman.owncloud.org/mailman/listinfo/</mailingListUrl>
+    <mailingListUrl>https://central.owncloud.org/</mailingListUrl>
     <docsUrl>https://doc.owncloud.org/</docsUrl>
     <iconUrl>https://cdn.jsdelivr.net/gh/chocolatey-community/chocolatey-coreteampackages@edba4a5849ff756e767cba86641bea97ff5721fe/icons/owncloud.png</iconUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
@@ -24,7 +24,7 @@ This package installs the ownCloud Sync Client on your computer.
 ]]></description>
     <summary>ownCloud Sync Client for Windows</summary>
     <releaseNotes>https://owncloud.org/changelog/desktop/</releaseNotes>
-    <copyright>What is the copyright</copyright>
+    <copyright>© 2020 ownCloud</copyright>
     <tags>owncloud-client owncloud cloud sync webdav caldav carddav admin</tags>
     <packageSourceUrl>https://github.com/chocolatey-community/chocolatey-coreteampackages/tree/master/automatic/owncloud-client</packageSourceUrl>
     <dependencies>