"./composer.json" does not contain valid JSON Parse error on line 130: ... } } },} -------------------^ Expected: 'STRING' - It appears you have an extra trailing comma

Process completed with exit code 1.

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/