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>

mk/support/index.html

@@ -483,6 +483,7 @@
                         <div class="marquee-group">
                                                 <img width="499" height="98" src="../../images/partners/ambasada-slo.png" alt="Амбасада на Република Словенија во Скопје" loading="lazy">
                                                 <img width="469" height="107" src="../../images/partners/nlb.png" alt="НЛБ Банка" loading="lazy">
+                                                <img width="463" height="160" src="../../images/partners/capital.png" alt="Capital Asset Management" loading="lazy">
                                                 <img width="800" height="287" src="../../images/partners/ctk.png" alt="Централна техничка библиотека (ЦТК), Универзитет во Љубљана" loading="lazy">
                                                 <img width="411" height="149" src="../../images/partners/dsmp.png" alt="Здружение на словенечки и македонски претприемачи (ДСМП)" loading="lazy">
                                                 <img width="501" height="156" src="../../images/partners/kampus.png" alt="Кампус" loading="lazy">
@@ -495,6 +496,7 @@
                     <div class="marquee-group" aria-hidden="true">
                                                 <img width="499" height="98" src="../../images/partners/ambasada-slo.png" alt="" loading="lazy">
                                                 <img width="469" height="107" src="../../images/partners/nlb.png" alt="" loading="lazy">
+                                                <img width="463" height="160" src="../../images/partners/capital.png" alt="" loading="lazy">
                                                 <img width="800" height="287" src="../../images/partners/ctk.png" alt="" loading="lazy">
                                                 <img width="411" height="149" src="../../images/partners/dsmp.png" alt="" loading="lazy">
                                                 <img width="501" height="156" src="../../images/partners/kampus.png" alt="" loading="lazy">