[cr135][WIP] Stub kPayOverTimeLearnMoreUrl

Chromium change:
https://chromium.googlesource.com/chromium/src/+/0c4d3ed8613607635c9ca608a58e035417d468e8

commit 0c4d3ed8613607635c9ca608a58e035417d468e8
Author: Wilson Low <[email protected]>
Date:   Tue Feb 11 11:26:26 2025 -0800

    [BNPL] Add pay over time toggle in Payment settings page

    This change adds the toggle for users to enable/disable BNPL in the
    settings page.

    Before: https://screenshot.googleplex.com/6euPENZQXmezhsy
    After:
    https://screencast.googleplex.com/cast/NjEwNTU0NDc3ODU3OTk2OHwxMjZlZGNmMS02Mw

    Bug: 378517835, 356443046

Author: cdesouza-chromium

chromium_src/chrome/common/url_constants.h

@@ -332,6 +332,12 @@ inline constexpr char16_t kPaymentMethodsURLForGPayWeb[] =
 inline constexpr char kAddressesAndPaymentMethodsLearnMoreURL[] =
     "https://support.brave.com";
 
+// The URL for the "Pay over time" support page.
+// TODO(crbug.com/395027230): Change URL once official support page is
+// finalized.
+inline constexpr char16_t kPayOverTimeLearnMoreUrl[] =
+    u"https://support.brave.com";
+
 // Help URL for Autofill Prediction Improvements.
 inline constexpr char16_t kAutofillAiLearnMoreURL[] =
     u"https://support.brave.com";