(refactor) minor code refactor

Author: alokdev94

src/template-builder/contents/classes/placeholders.html

@@ -21,7 +21,7 @@
         <li class="list-item list-item-bs-new" data-id="placeholder-bg" data-clipboard-text="placeholder bg-primary">
           <div class="list-item-content">
             <a href="#placeholder-bg" class="list-item-text">
-              <span class="item-filter-text">placeholder bg-#</span>
+              <span class="item-filter-text">placeholder bg-{color}</span>
             </a>
           </div>
 <div class="code-snippet">