Update ICU

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/1fa4e39..8a5b728

Add af and ur to common ICU (Trevor Perrier)
https://chromium.googlesource.com/chromium/deps/icu/+/8a5b728

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

Change-Id: I313ca3e905c578ecaa6a55916f9011fb67516e6c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3526720
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@{#79490}

DEPS

@@ -226,7 +226,7 @@ deps = {
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + 'ae5e06dd35c6137d335331b0815cf1f60fd7e3c5',
   'third_party/icu':
-    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '1fa4e3959ec6637182b7318ac1d382799454806d',
+    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '8a5b728e4f43b0eabdb9ea450f956d67cfb22719',
   'third_party/instrumented_libraries':
     Var('chromium_url') + '/chromium/src/third_party/instrumented_libraries.git' + '@' + 'e09c4b66b6e87116eb190651421f1a6e2f3b9c52',
   'third_party/ittapi': {