Instances are created without custom volumes

https://github.com/ansible-community/molecule-ec2/blob/08e1e57bff0d77e8100570e6d9b782171e831dc2/molecule_ec2/cookiecutter/%7B%7Bcookiecutter.molecule_directory%7D%7D/%7B%7Bcookiecutter.scenario_name%7D%7D/create.yml#L74 uses lowercase *volumes* field name, however molecule [schema](https://github.com/ansible-community/molecule/blob/52faa6647f2297f9a8f75dcc751299528ebadf64/src/molecule/data/molecule.json#L294) uses *volumes* for Docker volumes, ec2 volumes use an uppercase *Volumes* field. As a result that field never gets merged into instance config.
Attempt to name the field *volumes* instead of *Volumes* causes a schema validation error

Inspect the referenced create.yml line 74 and compare its volumes field with the EC2 schema in src/molecule/data/molecule.json around line 294. Trace how the instance configuration is merged and validated; done means custom EC2 volumes are retained without triggering schema validation errors.

Written by the indexing model from the issue text.