Update strings for Extensions menu

Bug: None
Change-Id: I0e40f2452674d4dfbb9b2ab68cae92701058f3a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1984750Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728041}

chrome/app/generated_resources.grd

@@ -4537,10 +4537,10 @@ Keep your key file in a safe place. You will need it to create new versions of y
         These extensions can see and change information on this site.
       </message>
       <message name="IDS_EXTENSIONS_MENU_WANTS_TO_ACCESS_SITE_DATA" desc="Header for section of extensions that want to access the current site's data">
-        To allow access on this site, click the extension.
+        To give an extension access to this site, click it.
       </message>
       <message name="IDS_EXTENSIONS_MENU_CANT_ACCESS_SITE_DATA" desc="Header for section of extensions that can't access the current site's data">
-        These extensions don't need access to this site.
+        These extensions don't need to see and change information on this site.
       </message>
 
       <!-- Settings API bubble -->