Update index.html

Author: JCinnamon

index.html

@@ -839,7 +839,6 @@ <h2 class="section-label">Teaching</h2>
       <h2 class="section-label">Tools</h2>
       <p class="tools-intro">Web tools for digital image analysis and visual research.</p>
       <div class="tools-grid">
-  <div class="tools-grid">
 
     <a class="tool-card" href="https://jcinnamon.github.io/urban-change-observer/">
       <div class="tool-card-thumb">