disable tpu workflow

Author: nitins17

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

@@ -12,13 +12,13 @@
 
 name: CI - Cloud TPU (nightly)
 on:
-  schedule:
-    - cron: "0 */2 * * *" # Run every 2 hours
-  workflow_dispatch: # allows triggering the workflow run manually
-# This should also be set to read-only in the project settings, but it's nice to
-# document and enforce the permissions here.
-permissions:
-  contents: read
+#   schedule:
+#     - cron: "0 */2 * * *" # Run every 2 hours
+#   workflow_dispatch: # allows triggering the workflow run manually
+# # This should also be set to read-only in the project settings, but it's nice to
+# # document and enforce the permissions here.
+# permissions:
+#   contents: read
 jobs:
   cloud-tpu-test:
     strategy: