bug #100 Fix github actions config to trigger build again after branch rename (acrobat)
bug #100 Fix github actions config to trigger build again after branch rename (acrobat)

This PR was merged into the 1.x branch.

Discussion
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| Q             | A
| ------------- | ---
| Bug fix?      | yes(ish)
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tickets       | 
| License       | MIT

With the renamed default branch the builds didn't trigger anymore in my last pr's. So I've updated the github actions config to work again, this change uses the new `$default-branch` env var github introduced when they added support for easily renaming default branches (https://github.blog/changelog/2020-07-22-github-actions-better-support-for-alternative-default-branch-names/)

Commits
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380ab0209fd0f5a5c29fa112ec8febd8d3c448a5 Fix github actions config to trigger build again after branch rename

park-manager/hubkit,park-manager/hubkit