element send keys: fix <input type=file> condition (#1376)

Author: JohnChen0

index.html

@@ -5715,7 +5715,7 @@ <h4><dfn>Element Send Keys</dfn></h4>
 
  <li><p>Run the substeps of the first matching condition:
   <dl class="switch">
-   <dt><var>file</var> is false.
+   <dt><var>file</var> is true.
    <dd>
     <ol>
      <li><p>Let <var>files</var> be the result of splitting <var>text</var>