Merge pull request #178 from su2code/conference_link

Update conference link 24->25

Author: pcarruscag

index.html

@@ -40,7 +40,7 @@ <h2 style="font-weight:700">Powerful. Fast. Free.</h2>
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       <h1>5th Annual SU2 Conference</h1>
        <h3>The 5th edition of the SU2 conference takes place in Varenna/Italy from 30th of September to 2nd of October.</h3>
-       <h3>Registration and abstract submission are open now and the links to the respective platforms together with all up-to-date information can be found on the <a href="https://su2foundation.org/su2conference2024/">conference website</a>.</h3>
+       <h3>Registration and abstract submission are open now and the links to the respective platforms together with all up-to-date information can be found on the <a href="https://su2foundation.org/su2conference2025/">conference website</a>.</h3>
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