update cache key to de-poison

sample failed builds: https://buildkite.com/bazel/google-bazel-presubmit/builds/85988#0192fe72-8b8d-48e6-84c2-79a20e0f7e46

https://buildkite.com/bazel/google-bazel-presubmit/builds/85982

buildkite/bazelci.py

@@ -1770,7 +1770,7 @@ def remote_caching_flags(platform, accept_cached=True):
     platform_cache_key = [
         BUILDKITE_ORG.encode("utf-8"),
         # Whenever the remote cache was known to have been poisoned increase the number below
-        "cache-poisoning-20230803".encode("utf-8"),
+        "cache-poisoning-20241105".encode("utf-8"),
         platform.encode("utf-8"),
     ]