Update copyright year from 2025 to 2026 in index.html; update images

Author: miksask

assets/images/mikalai_saskavets.jpg

@@ -317,7 +317,7 @@ <h2>Spaces</h2>
                 </div>
                 <div style="padding:120px 0">
                     <p>
-                        © 2025 Minsk Python Community. All rights reserved. This website is built using open-source software.
+                        © 2026 Minsk Python Community. All rights reserved. This website is built using open-source software.
                         The source code is available on
                         <a href="https://github.com/minskpython/minskpython.github.io" target="_blank" rel="noopener noreferrer">GitHub</a>.
                         We appreciate your contributions! Join our open community.