[IDN Spoof Checks] Add U+0A5C to digit lookalikes.

This CL adds U+0A5C as a lookalike character to the digit 3.  This
change appears to impact no domains seen in UKM.

Fixed: 1085315
Change-Id: Iea9930363d853f154e2d781646a1b0b5da7fbbfd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2212807
Auto-Submit: Joe DeBlasio <jdeblasio@chromium.org>
Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Joe DeBlasio <jdeblasio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#771217}

components/url_formatter/spoof_checks/idn_spoof_checker.cc

@@ -314,7 +314,7 @@ IDNSpoofChecker::IDNSpoofChecker() {
   digits_ = icu::UnicodeSet(UNICODE_STRING_SIMPLE("[0-9]"), status);
   digits_.freeze();
   digit_lookalikes_ = icu::UnicodeSet(
-      icu::UnicodeString::fromUTF8("[θ२২੨੨૨೩೭շзҙӡउওਤ੩૩౩ဒვპ੫丩ㄐճ৪੪୫૭୨౨]"),
+      icu::UnicodeString::fromUTF8("[θ२২੨੨૨೩೭շзҙӡउওਤ੩૩౩ဒვპੜ੫丩ㄐճ৪੪୫૭୨౨]"),
       status);
   digit_lookalikes_.freeze();