Add missing cover media to Create BlogPost page

modules/cms-kit/src/Volo.CmsKit.Admin.Web/Pages/CmsKit/BlogPosts/Create.cshtml

@@ -70,6 +70,8 @@
                 <select asp-for="ViewModel.BlogId" id="BlogSelectionSelect" class="form-control"></select>
                 <span asp-validation-for="ViewModel.BlogId"></span>
             </div>
+            
+            <abp-input asp-for="ViewModel.CoverImageMediaId" type="hidden" />
 
             <abp-input asp-for="ViewModel.Title" />