[CES-3466] Add a github action to prevent dev's merging !fixup commits#9

bryanfoley merged 1 commit intomainUltimaker/embedded-workflows:mainfrom

CES-3466-block-merging-if-fixup-commits-are-not-squashedUltimaker/embedded-workflows:CES-3466-block-merging-if-fixup-commits-are-not-squashedCopy head branch name to clipboard