remove aria-expanded attribute from div (#9901)

Author: Goodyear2017

src/NuGetGallery/Views/Packages/UploadPackage.cshtml

@@ -45,7 +45,7 @@
                             <span>Upload</span>
                         </a>
                     </h2>
-                    <div class="collapse in" id="upload-package-form" aria-expanded="true">
+                    <div class="collapse in" id="upload-package-form">
                         <form aria-hidden="true" id="cancel-form">
                             @Html.AntiForgeryToken()
                         </form>