Retry Windows failures to work around #2711 (#2712)

See #2711. This is a temporary workaround while we look for an actual
fix.

buildkite/bazelci.py

diff --git a/buildkite/bazelci.py b/buildkite/bazelci.py
index bdb3e5c..062db9c 100755
--- a/buildkite/bazelci.py
+++ b/buildkite/bazelci.py
@@ -3038,6 +3038,11 @@
         step["retry"]["automatic"].append({"exit_status": 128, "limit": 1})
         step["retry"]["automatic"].append({"exit_status": 1, "limit": 1})
 
+    # Automatically retry on Windows platforms to work around flaky failures.
+    # https://github.com/bazelbuild/continuous-integration/issues/2711
+    if platform == "windows" or platform == "windows_arm64":
+        step["retry"]["automatic"].append({"exit_status": 1, "limit": 1})
+
     if concurrency and concurrency_group:
         step["concurrency"] = concurrency
         step["concurrency_group"] = concurrency_group