Update hermesTag fixture to current version format (#56751)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/56751

The hermes-utils test used an old-style Hermes git tag
('hermes-2022-04-28-RNv0.69.0-...') as its fixture. Hermes now uses semver
version strings (e.g. '250829098.0.13'). Update the fixture to match the
current format so the test better represents real usage.

## Changelog:
[Internal] -

Reviewed By: cortinico

Differential Revision: D104649627

fbshipit-source-id: 00562fd7d0325acde6f4ccf906e4c34e3c705375