String change: Go Back -> Go back

Bug: 886952

Change-Id: Iffbd7918ba24f9e6447baa424a108b5736b6659d
Reviewed-on: https://chromium-review.googlesource.com/1233123
Commit-Queue: Varun Khaneja <[email protected]>
Reviewed-by: Adrienne Porter Felt <[email protected]>
Cr-Commit-Position: refs/heads/master@{#592442}
diff --git a/components/security_interstitials_strings.grdp b/components/security_interstitials_strings.grdp
index 077324b..2b2ca8d 100644
--- a/components/security_interstitials_strings.grdp
+++ b/components/security_interstitials_strings.grdp
@@ -397,7 +397,7 @@
     These charges could be one-time or recurring and may not be obvious.
   </message>
   <message name="IDS_BILLING_PRIMARY_BUTTON" desc="The text for the billing interstitial primary button.">
-    Go Back
+    Go back
   </message>
   <message name="IDS_BILLING_PROCEED_BUTTON" desc="The text for the billing interstitial proceed button.">
     Proceed