Crop Stanford Medicine logo (320x320 -> 296x87, drops whitespace) and balance heights

The provided PNG was a square image with the actual horizontal lab logo
sitting in the middle ~30% vertically; whitespace above and below was
visually inflating the footer row even after the height attribute was
shrunk. Cropped to the content bounding box. Both footer logos now
rendered at height 30 for balanced sizing.

Author: rhiju

_includes/footer.html

@@ -5,10 +5,10 @@
   </div>
   <div class="institutional-logos">
     <a href="https://med.stanford.edu/" target="_blank" rel="noopener noreferrer external">
-      <img src="{{ '/assets/images/site/public/nav_logo_stanford_medicine.png' | relative_url }}" alt="Stanford Medicine" height="10">
+      <img src="{{ '/assets/images/site/public/nav_logo_stanford_medicine.png' | relative_url }}" alt="Stanford Medicine" height="30">
     </a>
     <a href="https://www.hhmi.org/scientists/rhiju-das" target="_blank" rel="noopener noreferrer external">
-      <img src="{{ '/assets/images/site/public/nav_logo_hhmi.jpg' | relative_url }}" alt="Howard Hughes Medical Institute" height="60">
+      <img src="{{ '/assets/images/site/public/nav_logo_hhmi.jpg' | relative_url }}" alt="Howard Hughes Medical Institute" height="30">
     </a>
   </div>
 </footer>