styles: Uppercase to the export format selector

index.html

@@ -39,7 +39,7 @@
     <link
       rel="shortcut icon"
       type="image/png"
-      href="https://github.com/creecros/simple_logo_gen/blob/master/imgs/favicon.png?raw=true"
+      href="imgs/favicon.png"
     />
     <title>Simple Logo Generator</title>
   </head>
@@ -240,7 +240,7 @@ <h1 class="display-4">Simple Logo Generator</h1>
           <div class="input-group-prepend">
             <div class="input-group-text">Format</div>
           </div>
-          <select id="selectFormat" class="form-control" aria-label="format" aria-describedby="basic-addon1">
+          <select id="selectFormat" class="form-control text-uppercase" aria-label="format" aria-describedby="basic-addon1">
             <option value="image/png">png</option>
             <option value="image/jpeg">jpg</option>
             <option value="image/webp">webp</option>