Update ICU

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/d3ba6ae..bf66d37

Reduce size by using lao dictionary from ICU 69. (Frank Tang)
https://chromium.googlesource.com/chromium/deps/icu/+/bf66d37

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,ftang@chromium.org

Change-Id: Ibe8ce74e1cb9997f6da001e8dc445fe5656e1aca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3294011
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#78008}

DEPS

@@ -228,7 +228,7 @@ deps = {
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + '3e0e32ba300ce8afe695ad3ba7e81b21b7cf237a',
   'third_party/icu':
-    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + 'd3ba6ae0c0a1b940c496771431feff25d4262d42',
+    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + 'bf66d373ae781a3498f2babe7b61d933dd774b82',
   'third_party/instrumented_libraries':
     Var('chromium_url') + '/chromium/src/third_party/instrumented_libraries.git' + '@' + 'e09c4b66b6e87116eb190651421f1a6e2f3b9c52',
   'third_party/ittapi': {