[executorch hash update] update the pinned executorch hash (pytorch#147345)

This PR is auto-generated nightly by [this action](https://github.com/pytorch/pytorch/blob/main/.github/workflows/nightly.yml).
Update the pinned executorch hash.
Pull Request resolved: pytorch#147345
Approved by: https://github.com/pytorchbot

Author: pytorchupdatebot

.ci/docker/ci_commit_pins/executorch.txt

@@ -1 +1 @@
-f936c9992f9730e4996fd6ac16ed6cdc723190af
+5e4d6b6380d575e48e37e9d987fded4ec588e7bc