make the balloon icon a little smaller so it loads faster

Author: chrisorban

docs/activities.html

@@ -313,11 +313,11 @@ <h5 class="no-anchor card-title listing-title">
 </div>
 </a>
 </div>
-<div class="g-col-1" data-index="2" data-categories="QWR2YW5jZWQlMjBIUyUyQ01hdGglMkNQaHlzaWNhbCUyMFNjaWVuY2UlMkNQaHlzaWNzJTJDQXRtb3NwaGVyaWMlMjBTY2llbmNlJTJDRGF0YSUyMFNjaWVuY2UlMkNTcGFjZSUyQ1NwcmVhZHNoZWV0cw==" data-listing-file-modified-sort="1751701278893" data-listing-reading-time-sort="10" data-listing-word-count-sort="1839">
+<div class="g-col-1" data-index="2" data-categories="QWR2YW5jZWQlMjBIUyUyQ01hdGglMkNQaHlzaWNhbCUyMFNjaWVuY2UlMkNQaHlzaWNzJTJDQXRtb3NwaGVyaWMlMjBTY2llbmNlJTJDRGF0YSUyMFNjaWVuY2UlMkNTcGFjZSUyQ1NwcmVhZHNoZWV0cw==" data-listing-file-modified-sort="1751702954041" data-listing-reading-time-sort="10" data-listing-word-count-sort="1839">
 <a href="./projects/balloon.html" class="quarto-grid-link">
 <div class="quarto-grid-item card h-100 card-left">
 <p class="card-img-top">
-<img loading="lazy" src="./img/balloon_release3.png" class="thumbnail-image card-img" style="height: 150px;">
+<img loading="lazy" src="./img/balloon_release4.png" class="thumbnail-image card-img" style="height: 150px;">
 </p>
 <div class="card-body post-contents">
 <h5 class="no-anchor card-title listing-title">

docs/img/balloon_release4.png

@@ -1,6 +1,6 @@
 ---
 title: "Air Pressure Versus Height: 2. Balloon Data"
-image: ../img/balloon_release3.png
+image: ../img/balloon_release4.png
 categories:
     - Advanced HS
     - Math