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>

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

@@ -258,7 +258,7 @@
                     <h2 id="before-your-first-day">Before your first day</h2>
                     <p>Save every welcome email and check whether registration is required. Central events usually explain student life and administrative procedures, while faculty sessions explain your timetable, course registration, student portal, tutors, and programme expectations. Attend both whenever possible.</p>
                     <h2 id="sources">Sources</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>