Set ocid and id consistently in examples

[odscjen]

split out from #1666 (comment)

Noting that as part of going through all the examples for this issue, I think it'll be useful to use a consistent approach to setting ocid and id. I suggest the following:

• ocid: Set to 'ocds-213czf-0000' for the first contracting process in each subfolder of examples. If there's more than one contracting process in the subfolder, set the ocid of the subsequent processes to 'ocds-213czf-0001', 'ocds-213czf-0002' etc.
• id: Set incrementally within the scope of the contracting process the release relates to, e.g. '1', '2' etc.

Wait until #1680 is merged before working on this