[Settings]Fix/improve settings/oobe text (#22276)

* correct the uid

* Remove periods and generalize "Appearance & behavior" uid

Descriptions don't need a period, unless they're full sentences.

* simplify bold text to interactive elements

the 3 changes from bold to code are for readability

* rev feet

* -1 ing

src/settings-ui/Settings.UI/Views/ShortcutGuidePage.xaml

@@ -89,7 +89,7 @@
                 </controls:SettingsGroup>
 
                 <controls:SettingsGroup
-                    x:Uid="ShortcutGuide_Appearance_Behavior"
+                    x:Uid="Appearance_Behavior"
                     IsEnabled="{x:Bind Mode=OneWay, Path=ViewModel.IsEnabled}">
                     <labs:SettingsCard
                         x:Uid="ColorModeHeader"