style(research): replace motivation icon

Author: amyheather

pages/research.qmd

@@ -17,7 +17,7 @@ Our research has been focused on helping improving the reproducibility, reusabil
 ```{=html}
 <br>
 <a href="research/motivation.qmd" class="value-box pale small-title">
-  <div class="icon"><i class="bi bi-arrow-clockwise"></i></div>
+  <div class="icon"><i class="bi bi-lightbulb"></i></div>
   <div class="text">
     <div class="title">Motivation: a failed attempt at reuse</div>
     <div class="details">STARS grew out of an unsuccessful attempt to share a stroke simulation model with the NHS in England. That experience showed how important it is for simulation research to be open, reproducible, and reusable by others.</div>