Update dotnet sdk create file example

The latest version of our SDKs use InputFile.

Author: stnguyen90

src/SDK/Language/DotNet.php

@@ -236,7 +236,7 @@ public function getParamExample(array $param): string
         if (empty($example) && $example !== 0 && $example !== false) {
             switch ($type) {
                 case self::TYPE_FILE:
-                    $output .= 'new File("./path-to-files/image.jpg")';
+                    $output .= 'InputFile.FromPath("./path-to-files/image.jpg")';
                     break;
                 case self::TYPE_NUMBER:
                 case self::TYPE_INTEGER: