Updated copyright date to 2025

Author: jstedfast

Documentation/Content/License.aml

@@ -45,7 +45,7 @@
       <title>Copyright Notices</title>
       <content>
         <para>
-          <application>MimeKit</application> and <application>MailKit</application> are Copyright © 2013-2022 Jeffrey Stedfast
+          <application>MimeKit</application> and <application>MailKit</application> are Copyright © 2013-2025 Jeffrey Stedfast
         </para>
       </content>
     </section>