If a test fails, `continue-on-error` will not be evaluated, if it's not set.
https://github.com/eksperimental-forks/elixir/actions/runs/19824449905/job/56794214695#step:9:46
2196 doctests, 4913 tests, 1 failure (18 excluded)
make: *** [Makefile:289: test_stdlib] Error 2
Error: Process completed with exit code 2.
Error: The step failed and an error occurred when attempting to determine whether to continue on error.
Error: The template is not valid. .github/workflows/ci.yml (Line: 78, Col: 28): Unexpected value ''
Eksperimental
cad69f790f