Change secret for wheel publishing (#1955)
The workflow GitHub App default credential in OpenXLA cannot create
GitHub releases.
Follow the convention identified by IREE in OpenXLA which uses a
[repository
secret](https://github.com/openxla/iree/blob/79b6129e2333ae26e7e13b68c27566102dcece6e/.github/workflows/validate_and_publish_release.yml#L112C37-L112C55)
linked to a developers credential with repo permissions.
The secret created here was created by gleasonk@ and the secret at the
moment of this commit belongs to fzakaria@.
It is valid for 1-year.
