added new trailer image

Author: s-fletcher

img/assets/trailer_placeholder.png

@@ -84,7 +84,7 @@
       <section class="section-container">
         <div data-aos="fade-right" class="about-container">
           <div class="video-container right">
-            <img src="img/media/1_cropped.png" alt="">
+            <img src="img/assets/trailer_placeholder.png" alt="">
           </div>
           <div class="about-info left">
             <h1>What's Hacklahoma?</h1>