Update XLA dependency to use revision

http://github.com/openxla/xla/commit/3684be8fa3a5e0356fcd9197ec33c26dee8029ff.

PiperOrigin-RevId: 614344476

Author: jax authors

third_party/xla/workspace.bzl

@@ -20,8 +20,8 @@ load("//third_party:repo.bzl", "tf_http_archive", "tf_mirror_urls")
 #    curl -L https://github.com/openxla/xla/archive/<git hash>.tar.gz | sha256sum
 #    and update XLA_SHA256 with the result.
 
-XLA_COMMIT = "a4204a1e81f50e375778397bcdde3515b2674f43"
-XLA_SHA256 = "6de2c29774063dd43c557985144e537da799f74b0014beed2a3545900e7bc0b0"
+XLA_COMMIT = "3684be8fa3a5e0356fcd9197ec33c26dee8029ff"
+XLA_SHA256 = "0599cce382ccada773dc8721891a3069581df0329b4dcdd25edbeb30e149a822"
 
 def repo():
     tf_http_archive(