Update translation files, add Ukrainian translation

Also: Fix year for copyright statement

public/static/js/qa.js

@@ -492,7 +492,7 @@ class ConcPage {
         licenseLine.appendChild(this.createPlainTextElem("span", ", "));
 
         const attributionYear = document.createElement("span");
-        attributionYear.textContent = "2023";
+        attributionYear.textContent = "2025";
         licenseLine.appendChild(attributionYear);
 
         footer.appendChild(licenseLine);