Failed to load actions/checkout/v4/action.yml

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)

actions/checkout/v4/action.yml: (Line: 1, Col: 1, Idx: 0) - (Line: 1, Col: 2, Idx: 1): While scanning for the next token, find character that cannot start any token.

The macos-latest label will migrate to macOS 15 beginning August 4, 2025. For more information see https://github.com/actions/runner-images/issues/12520