[fenix] Address typos on start on home strings (https://github.com/mozilla-mobile/fenix/pull/19903)

app/src/main/res/values/strings.xml

@@ -573,11 +573,11 @@
     <!-- Start on Home -->
     <!-- Title of a preference that allows a user to indicate after a specified amount of time when the app should start on the home screen -->
     <string name="preferences_start_on_home">Start on home</string>
-    <!-- Option for staring on the home screen after after four hours or inactivity -->
+    <!-- Option for starting on the home screen after after four hours or inactivity -->
     <string name="start_on_home_after_four_hours">After four hours</string>
-    <!-- Option for always staring on the home screen -->
+    <!-- Option for always starting on the home screen -->
     <string name="start_on_home_always">Always</string>
-    <!-- Option for never staring on the home screen -->
+    <!-- Option for never starting on the home screen -->
     <string name="start_on_home_never">Never</string>
     <!-- Summary for tabs preference when auto closing tabs setting is set to manual close-->
     <string name="close_tabs_manually_summary">Close manually</string>