Added error message

Author: Jack251970

Flow.Launcher/Languages/en.xaml

@@ -367,6 +367,8 @@
 
     <!--  Release Notes Window  -->
     <system:String x:Key="seeMoreReleaseNotes">See more release notes on GitHub</system:String>
+    <system:String x:Key="checkNetworkConnectionTitle">Failed to fetch release notes</system:String>
+    <system:String x:Key="checkNetworkConnectionSubTitle">Please check your network connection or ensure GitHub is accessible</system:String>
 
     <!--  FileManager Setting Dialog  -->
     <system:String x:Key="fileManagerWindow">Select File Manager</system:String>

Flow.Launcher/ReleaseNotesWindow.xaml.cs

@@ -131,6 +131,9 @@ private async void RefreshMarkdownViewer()
                 {
                     RefreshButton.Visibility = Visibility.Visible;
                     MarkdownViewer.Visibility = Visibility.Collapsed;
+                    App.API.ShowMsgError(
+                        App.API.GetTranslation("checkNetworkConnectionTitle"),
+                        App.API.GetTranslation("checkNetworkConnectionSubTitle"));
                 }
                 else
                 {