OpenTAP help file updates
Incorporate new sentence to https://gitlab.com/OpenTAP/opentap/-/blob/master/CONTRIBUTING.md topic so external users will know what types of changes can be accepted without a CLA.
Incorporate new sentence to https://gitlab.com/OpenTAP/opentap/-/blob/master/CONTRIBUTING.md topic so external users will know what types of changes can be accepted without a CLA.