Update src/Browser.php

Co-authored-by: Simon Frings <[email protected]>

Author: 51imyyy

src/Browser.php

@@ -766,10 +766,10 @@ public function withHeader($header, $value)
      * $browser = $browser->withoutHeader('User-Agent');
      *
      * $browser->get($url)->then(function (Psr\Http\Message\ResponseInterface $response) {
-     * //won't contain the User-Agent header
-     * var_dump($response);
+     *     //won't contain the User-Agent header
+     *     var_dump($response);
      * }, function (Exception $e) {
-     * echo 'Error: ' . $e->getMessage() . PHP_EOL;
+     *     echo 'Error: ' . $e->getMessage() . PHP_EOL;
      * });
      * ```
      *