refine gallery

gallery.html

@@ -134,8 +134,8 @@
     <div class="container">
       <div class="row">
         <div class="col text-center">
-          <h2>Image In-Place Preview</h2>
-          <img alt="image" class="img-fluid mt-5" src="./imgs/img_image_preview.png">
+          <h2>In-Place Preview</h2>
+          <img alt="image" class="img-fluid mt-5" src="./imgs/inplace_preview.png">
         </div>
       </div>
     </div>