Second attempt to get file hashes when git checkout is done

[pljones]

Short description of changes

Hopefully a fix for:

Error: The template is not valid. .github/workflows/autobuild.yml (Line: 326, Col: 37): hashFiles('.github/workflows/autobuild.yml, .github/autobuild/mac.sh, mac/deploy_mac.sh') failed. Fail to hash files under directory '/Users/runner/work/jamulus/jamulus'

... but Claude Haiku thinks it's intermittent. GPT 5 mini came up with roughly this idea. Ideally it would be done once the check out is confirmed to have completed successfully.

CHANGELOG: SKIP

Context: Fixes an issue?

Yes

Does this change need documentation? What needs to be documented and how?

No

Status of this Pull Request

Waiting a clean build through Github.

What is missing until this pull request can be merged?

Hopefully doesn't break anything...

Checklist

• I've verified that this Pull Request follows the general code principles
• I tested my code and it does what I want
• My code follows the style guide
• I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• I've filled all the content above

[pljones]

Only ten goes to get that right.

[pljones]

OK, so not quite:

Cache not found for input keys: macos--QT_VERSION=6.9.1 SIGN_IF_POSSIBLE=1 TARGET_ARCHS="x86_64 arm64" ./.github/autobuild/mac.sh

I'm obviously not referencing the value correctly.

[dtinth]

Seems like this is a bug in GitHub Actions; see:

• Fail to hash files actions/runner-images#13341

[pljones]

OK, so eventually it ran with a valid cache key, decided it hadn't populated the cache, so it did that. I reran the macOS step and....

Cache hit for: macos-0edefb6f961eeacf4814d048ad2c93287eba1b35aeae2bf4ba3b5c37628026ac-QT_VERSION=6.9.1 SIGN_IF_POSSIBLE=1 TARGET_ARCHS="x86_64 arm64" ./.github/autobuild/mac.sh

... it found the cache! So that looks like it might just work.

[pljones]

Seems like this is a bug in GitHub Actions; see:

• Fail to hash files actions/runner-images#13341

Given the above, we probably won't need this PR.

[pljones]

#3563
The above builds cleanly with the action rollback so, as that's what triggered this PR, I'll close it.