[website] fix some image width

website/templates/index/efficient.html

@@ -8,7 +8,7 @@ <h2 id="hardware-efficient" class="my-4">Hardware efficient</h2>
             more hot data in RAM, which leads to a shorter typical response times.</p>
             </div>
             <div class="col-lg-4">
-                <img src="images/index/hardware-efficient.jpg" alt="ClickHouse is hardware efficient" />
+                <img src="images/index/hardware-efficient.jpg" class="img-fluid" alt="ClickHouse is hardware efficient" />
             </div>
         </div>
         <div class="row">

website/templates/index/hero.html

@@ -41,7 +41,7 @@ <h2>Try online demo</h2>
             </div>
         </div>
         <div class="col-lg-5 py-5 px-0">
-            <img src="images/index/intro.svg" alt="ClickHouse is capable of generating analytical data reports in real time" class="my-3" />
+            <img src="images/index/intro.svg" alt="ClickHouse is capable of generating analytical data reports in real time" class="my-3 img-fluid" />
         </div>
     </div>
 </div>