Update public/index.html

public/index.html

@@ -189,7 +189,7 @@
     </div>
     <div class="container" style="height:70px;">
       <!--<p>Filter:</p>-->
-      <button class="btn" style="background-color: lightgray;" id="filterall" onclick="filter('All')">All</button>
+      <button class="btn" style="background-color: gray;" id="filterall" onclick="filter('All')">All</button>
 	    <button class="btn" style="background-color: lightgray;" id="filter2023" onclick="filter(2023)">2023</button>
 	    <button class="btn" style="background-color: lightgray;" id="filter2022" onclick="filter(2022)">2022</button>
       <button class="btn" style="background-color: lightgray;" id="filter2021" onclick="filter(2021)">2021</button>