Update TFRT dependency to use revision
http://github.com/tensorflow/runtime/commit/8ffb29d04cae1acab608f5a9cc06539e865fe922.

PiperOrigin-RevId: 422534989
Change-Id: I87cf903a26c3936822e357f410fe79f463963257
diff --git a/third_party/tf_runtime/workspace.bzl b/third_party/tf_runtime/workspace.bzl
index 0648205..f192459 100644
--- a/third_party/tf_runtime/workspace.bzl
+++ b/third_party/tf_runtime/workspace.bzl
@@ -6,8 +6,8 @@
     """Imports TFRT."""
 
     # Attention: tools parse and update these lines.
-    TFRT_COMMIT = "7c91ffefaa425e8851ceb62109dc816ca88e7926"
-    TFRT_SHA256 = "2001e83789b6205710d8d48a4647548db8b447c44f057666b0498bd11168a47a"
+    TFRT_COMMIT = "8ffb29d04cae1acab608f5a9cc06539e865fe922"
+    TFRT_SHA256 = "201b7f7d3f21ba211a6ff1ab97e61ca985580eed40789de5a9d0572ac70ba1ed"
 
     tf_http_archive(
         name = "tf_runtime",