Add game website URL input to suggest form

wwwroot/index.html

@@ -36,6 +36,7 @@
           <div class="stack horizontal">
             <input name="screenshotUrl" maxlength="2048" placeholder="Screenshot URL" />
             <input name="youtubeUrl" maxlength="2048" placeholder="YouTube URL" />
+            <input name="gameUrl" maxlength="2048" placeholder="Game website URL" />
           </div>
           <button type="submit">Submit</button>
         </form>