Update FastCI step to v0 tag

[attiasas]

• The pull request is targeting the dev branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....
• All static analysis checks passed.
• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• Updated the Contributing page / ReadMe page / CI Workflow files if needed.
• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

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Following: https://jfrog.slack.com/archives/C0A3QV7HU3V/p1766917354022259
Update to use: https://github.com/jfrog-fastci/fastci/tree/v0

To ensure FastCI functions correctly and receives the latest feature updates, please move all your workflows to the v0 tag.

[github-actions]

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