Bump GHA cache version to force reinstall

[Bisaloo]

Related to: #190 (comment)

Description

Force reinstall of Rhdf5lib / rhdf5 by creating a new package cache for the lint and pkgdown GitHub Action workflows. The same result can be achieved by manually deleting the existing caches rather than bumping the cache version.

Checklist

Before review

• Update and regenerate man pages
• Add/update tests
• Add/update examples in vignettes
• Pass CI checks

Before merge

• Update NEWS
• Bump devel version

[lazappi]

Thanks for the PR! I've tried deleting the cache manually before but it's only a temporary fix. I think the issue might be that different actions are using the same cache name and there is a conflict. I've been meaning to check the names are unique but I haven't got to it yet. If you can check and update the PR that would be great.

[Bisaloo]

Yes, you're probably right. The way to fix it should be to set a different cache version, which is then used to create the cache name, for the workflows generating conflicting caches, which is what this PR is doing.