Settings: Fix string not following style guide

Translation team flagged this string for having an erroneous period.

Bug: 1032584
Change-Id: Iedc92d023a6fe9e223c1be426daf4370122d1d43
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2131916Reviewed-by: dpapad <dpapad@chromium.org>
Commit-Queue: Sean Harrison <harrisonsean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755392}

chrome/app/settings_strings.grdp

@@ -2412,7 +2412,7 @@
   </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_COOKIES_BLOCK" desc="The sub-label for links to manage cookies when the current cookie setting is allow.">
     {COUNT, plural,
-     =0 {Cookies are blocked.}
+     =0 {Cookies are blocked}
      =1 {Cookies are blocked, 1 exception}
      other {Cookies are blocked, {COUNT} exceptions}}
   </message>