record_package_schema: fix record definition letter case

[yolile]

closes #641

[yolile]

hmm now the test is failing due to:

schema/record-package-schema.json includes "object" in "items/type" at /definitions/Record/properties/releases/oneOf/0/items

This is because linked releases. Should I move linked releases to record package schema definition as well?

[jpmckinney]

In records_reference there's :pointer: /definitions/record/properties/releases/oneOf/0/items which needs to be updated.

Otherwise, for the lint error, we can either copy the exception that was there for record, or we can moved linked release to a definition to $reference.

[yolile]

or we can moved linked release to a definition to $reference.

I will move the linked release object to a definition in the record_package_schema

[jpmckinney]

@yolile I added a commit, because we try to avoid referencing the JSON type in field descriptions. While fixing that for LinkedRelease I noticed a few related descriptions I could tidy.

[yolile]

@jpmckinney looks good! should we include the descriptions updates in the changelog as well?

[jpmckinney]

Good catch! I added a commit.

[yolile]

@jpmckinney perfect, in that case, do you want to approve this or should I merge it directly?