update serial support warning message

index.html

@@ -215,10 +215,10 @@
               -->
               <div class="alert alert-warning" role="alert" id="serial-error">
                 <p>Oh no! Looks like neither the <a class="link-primary link-offset-2 link-underline-opacity-25 link-underline-opacity-100-hover" href="https://caniuse.com/web-serial" target="_blank" title="CanIUse? Web Serial API"> Web Serial API</a>, 
-                  nor <a class="link-primary link-offset-2 link-underline-opacity-25 link-underline-opacity-100-hover" href="https://caniuse.com/webusb" target="_blank" title="CanIUse? WebUSB">WebUSB</a> are not supported in your browser.</p>
+                  nor <a class="link-primary link-offset-2 link-underline-opacity-25 link-underline-opacity-100-hover" href="https://caniuse.com/webusb" target="_blank" title="CanIUse? WebUSB">WebUSB</a> are supported in your browser.</p>
 
                 <p>Please switch to the latest Chromium-based browser (e.g. Chrome, Edge, etc.) or enable one of the features in your browser's settings if possible.
-                  Otherwise you cannot use any serial devices.</p>
+                  Otherwise it's not possible to connect to serial devices.</p>
               </div>
 
               <div id="serial-div" class="h-100">