[CI] Testing changes to tpu jobs

PiperOrigin-RevId: 834845020

Author: MichaelHudgins

.github/workflows/cloud-tpu-ci-presubmit.yml

@@ -36,9 +36,10 @@ jobs:
     # Begin Presubmit Naming Check - name modification requires internal check to be updated
     name: "TPU test (jaxlib=head)"
     with:
-      runner: "linux-x86-ct6e-180-8tpu"
+      # DO_NOT_SUBMIT: Change back to v6e-8
+      runner: "linux-x86-tpu7x-224-4tpu"
       cores: "8"
-      tpu-type: "v6e-8"
+      tpu-type: "v7x-4"
       python: "3.14-nogil"
       libtpu-version-type: "nightly"
       halt-for-connection: false