feat: reset input value, so user can upload again

Author: Keillion

hello-world/blazor/README.md

@@ -232,6 +232,7 @@ window.startImageDecode = async () => {
   resultsContainer.innerText = ""; // Reset results container
 
   const { files } = inputElement;
+  inputElement.value = '';
 
   try {
     for (let file of files) {