Update text's for close tab section

Resolves #6960

Auditors:
@bradleyrichter

Test Plan:
- text's for close tab section should be the same as image attached to the original issue

app/extensions/brave/locales/en-US/preferences.properties

@@ -131,10 +131,10 @@ startsWith=Brave starts with
 startsWithOptionLastTime=My windows / tabs from last time
 startsWithOptionHomePage=Home page
 startsWithOptionNewTabPage=a new tab
-tabCloseActionLastActive=Last active tab
-tabCloseActionNext=Next tab
-tabCloseActionFirst=First tab
-tabCloseActionParent=Parent tab
+tabCloseActionLastActive=Select the last viewed tab
+tabCloseActionNext=Select the next tab
+tabCloseActionFirst=Select the first tab
+tabCloseActionParent=Select its parent tab
 newTabMode=A new tab shows
 newTabBlank=blank
 newTabNewTabPage=Dashboard
@@ -149,7 +149,7 @@ engineGoKey=Engine Go Key (Type First)
 switchToNewTabs=Switch to new tabs immediately
 paintTabs=Show tabs in page theme color
 tabsPerTabPage=Number of tabs per tab set:
-tabCloseAction=Which tab should be activated after the tab is closed:
+tabCloseAction=When closing an active tab:
 showTabPreviews=Show tab previews on hover
 showHistoryMatches=Show history matches
 showBookmarkMatches=Show bookmark matches