/home/runner/work/setup-headless-display-action/setup-headless-display-action/./action.yml: (Line: 50, Col: 4, Idx: 1336) - (Line: 50, Col: 4, Idx: 1336): While parsing a block mapping, did not find expected key.

System.ArgumentException: Unexpected type '' encountered while reading 'action manifest root'. The type 'MappingToken' was expected. at GitHub.DistributedTask.ObjectTemplating.Tokens.TemplateTokenExtensions.AssertMapping(TemplateToken value, String objectDescription) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)

Failed to load /home/runner/work/setup-headless-display-action/setup-headless-display-action/./action.yml

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.