content: add Capital sponsor to partner marquee + fix MSS livestream embeds

- Add the Capital Asset Management logo to the partner/sponsor marquee on the
  homepage and Support page (both carousel groups, EN/MK/SI).
- Fix the Meet Student Slovenia livestream embeds: the 2024 page was embedding
  the 2023 recording. Now 2024 embeds the 2024 live (00GGIfVx8wA) and 2023
  embeds the 2023 live (DJD02mQIE98), as proper iframes on all three languages
  (MK/SI 2024 previously had only a placeholder "#" link).

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

en/projects/meet-student-slovenia-2023/index.html

@@ -290,6 +290,9 @@
 </figure>
 <h2 id="livestream">For those who were not physically present with us</h2>
 <p>Not everyone managed to be present in the hall, but that's why we made sure no one was left without this experience. We broadcast the event live through our Facebook page, and the recording is still available. If you want to experience the atmosphere and hear the stories first-hand, you can watch the entire event at this link here.</p>
+<div class="video-responsive">
+<iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen="" frameborder="0" src="https://www.youtube-nocookie.com/embed/DJD02mQIE98" title="YouTube video player"></iframe>
+</div>
 <figure class="article-inline-image">
 <img alt="Poster for the 'Meet Student Slovenia' event" decoding="async" height="1280" loading="lazy" src="../../../images/event3-photo-10.webp" width="1920"/>
 <figcaption>Photograph of the event poster!</figcaption>