validate other YAML files, such as the ones used in the documentation,
and GitHub actions workflows, to prevent issues such as;
- 30295c1750
- 8e8d9a3650
With this patch:
hack/validate/yamllint
Congratulations! yamllint config file formatted correctly
Congratulations! YAML files are formatted correctly
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>