[iOS][Chrome-Guard] Rephrases string

This CL rephrases the cookies status "Block Third-Party in Incognito"  in
"Block in Incognito".

Bug: 1063824
Change-Id: I550a63a1608c981bd2af30121f4ff5508f653c43
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251619Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779773}

ios/chrome/app/strings/ios_strings.grd

@@ -1843,7 +1843,7 @@ While in incognito, sites can't use cookies to see your browsing activity across
         Block Third-Party
       </message>
       <message name="IDS_IOS_COOKIES_BLOCK_THIRD_PARTY_INCOGNITO" desc="Label that informs the user that Third-Party cookies are blocked only in Incognito">
-        Block Third-Party in Incognito
+        Block in Incognito
       </message>
       <message name="IDS_IOS_SETTINGS_PASSWORDS_SAVED_HEADING" desc="The title for a list of username/site/password items. These items are already saved by the browser and can be deleted/edited. [Length: one line] [iOS only]">
       Saved Passwords

ios/chrome/app/strings/ios_strings_grd/IDS_IOS_COOKIES_BLOCK_THIRD_PARTY_INCOGNITO.png.sha1

-3b9f5f6cc0b8e73e386f4e851f4261e6f51402d6
\ No newline at end of file
+951bd1014db1e5a7c30759c75fa2e169db405784
\ No newline at end of file