Fix HTML formatting in 2025 edition file

Author: cmihaigabriel

_editions/2025.md

@@ -34,7 +34,7 @@ Signup for MediaEval 2025 is now open via the [MediaEval 2025 registration form]
 
 <a href="https://www.sigmm.org/">
  <img src="https://multimediaeval.github.io/editions/2020/docs/sigmmlogo.gif" width=150/>
-</a>
+</a><br>
 <a href="https://www.adaptcentre.ie/">
   <img src="https://multimediaeval.github.io/editions/2025/docs/adaptlogo.jpg" width=150/>
 </a>