Your requirements could not be resolved to an installable set of packages. Problem 1 - typo3/cms-core[v12.4.0, ..., v12.4.20] require php ^8.1 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires typo3/cms-core ^12.4 -> satisfiable by typo3/cms-core[v12.4.0, ..., v12.4.20].

Process completed with exit code 2.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/