Update strings for Safe Browsing interstitial

See:
https://docs.google.com/document/d/1E1uyto12NGe9kZFpqH8T8pRyhaOdzcKwHW51RETw-0Q/edit

Bug: 979119
Change-Id: I21c84f254c90d17884b3038ab3ec23121994d6ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1730580
Commit-Queue: Xinghui Lu <xinghuilu@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683418}

components/security_interstitials_strings.grdp

@@ -248,7 +248,7 @@
     Privacy policy
   </message>
   <message name="IDS_SAFE_BROWSING_SCOUT_REPORTING_AGREE" desc="SafeBrowsing Scout label next to checkbox">
-    Help improve Safe Browsing by sending some <ph name="BEGIN_WHITEPAPER_LINK">&lt;a href="#" id="whitepaper-link"&gt;</ph>system information and page content<ph name="END_WHITEPAPER_LINK">&lt;/a&gt;</ph> to Google. <ph name="PRIVACY_PAGE_LINK">$1</ph>
+    Help improve Chrome security by sending <ph name="BEGIN_WHITEPAPER_LINK">&lt;a href="#" id="whitepaper-link"&gt;</ph>URLs of some pages you visit, limited system information, and some page content<ph name="END_WHITEPAPER_LINK">&lt;/a&gt;</ph> to Google. <ph name="PRIVACY_PAGE_LINK">$1</ph>
   </message>
 
   <!-- Harmful download interstitial -->

components/security_interstitials_strings_grdp/IDS_SAFE_BROWSING_SCOUT_REPORTING_AGREE.png.sha1

+540ac19f59fd8051492e34fb594618d0c368f934
\ No newline at end of file