Add auto update subtitle

Author: Jack251970

Flow.Launcher/Languages/en.xaml

@@ -93,6 +93,7 @@
     <system:String x:Key="typingStartEn">Always Start Typing in English Mode</system:String>
     <system:String x:Key="typingStartEnTooltip">Temporarily change your input method to English mode when activating Flow.</system:String>
     <system:String x:Key="autoUpdates">Auto Update</system:String>
+    <system:String x:Key="autoUpdatesTooltip">Automatically check app updates and notify if there are any updates available</system:String>
     <system:String x:Key="select">Select</system:String>
     <system:String x:Key="hideOnStartup">Hide Flow Launcher on startup</system:String>
     <system:String x:Key="hideOnStartupToolTip">Flow Launcher search window is hidden in the tray after starting up.</system:String>

Flow.Launcher/SettingPages/Views/SettingsPaneGeneral.xaml

@@ -182,7 +182,8 @@
             <cc:Card
                 Title="{DynamicResource autoUpdates}"
                 Margin="0 14 0 0"
-                Icon="&#xecc5;">
+                Icon="&#xecc5;"
+                Sub="{DynamicResource autoUpdatesTooltip}">
                 <ui:ToggleSwitch
                     IsOn="{Binding AutoUpdates}"
                     OffContent="{DynamicResource disable}"