fix(news): style Sources lists with guide-linklist across articles

The Sources sections on the Welcome Days, accommodation-search and
Ad futura scholarship articles used bare <ul>/<ol> lists, which rendered
as default bullets/numbers with plain blue links instead of the site's
standard source-list style (chain icon, teal links, row dividers).

Add class="guide-linklist" to the Sources lists (converting Ad futura's
<ol> to <ul>) in the content/ source markdown and the generated en/mk/si
pages, matching the Student Welcome Guide. Edits scoped to the affected
articles to avoid unrelated build-tool reformatting churn.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

si/blog/welcome-days-slovenian-universities-2026-2027/index.html

@@ -258,7 +258,7 @@
                     <h2 id="pred-prvim-dnem">Pred prvim dnem</h2>
                     <p>Shranite vsa pozdravna sporočila in preverite, ali je potrebna prijava. Osrednji dogodki običajno pojasnijo študentsko življenje in administrativne postopke, fakultetni dogodki pa urnik, prijavo predmetov, študentski portal, tutorstvo in pričakovanja programa. Kadar je mogoče, se udeležite obeh.</p>
                     <h2 id="viri">Viri</h2>
-                    <ul>
+                    <ul class="guide-linklist">
                         <li><a href="https://www.uni-lj.si/en/events/2026-09-16-welcome-day-for-international-students-2026" target="_blank" rel="noopener">Welcome Day for International Students 2026</a></li>
                         <li><a href="https://www.uni-lj.si/en/study/international-students" target="_blank" rel="noopener">International students at the University of Ljubljana</a></li>
                         <li><a href="https://fe.uni-lj.si/en/study/international-exchanges/arrival-to-slovenia/" target="_blank" rel="noopener">Example of a faculty-specific Erasmus Welcome Day, Faculty of Electrical Engineering</a></li>