"Series" field needs to be made multiple in the "all fields" sample json in the guide

[landreev]

Note: this needs to be done before 5.14!

The field "series" has been made multiple since 5.13. However, the example "all fields" json file we provide in the guide (scripts/api/data/dataset-create-new-all-default-fields.json) still has a single-value entry for it, making the json unimportable, once the soc. sci. metadata block is updated:

            "typeName": "series",
            "multiple": false,
            "typeClass": "compound",
            "value": {
              "seriesName": {
              ...

It just needs to be updated the same way we've already updated the file src/test/java/edu/harvard/iq/dataverse/export/ddi/dataset-create-new-all-ddi-fields.json (used by the ddi export tests):

           "typeName": "series",
            "multiple": true,
            "typeClass": "compound",
            "value": [ 
              {
                ...

Worth noting that we've been through the same issue with the other field that was recently made multiple - productionPlace. Plus there were all sorts of other things that were missed when those 2 fields were updated in their respective blocks that we had to keep fixing. I will open an issue for documenting a checklist of all such things and all the places where things need to be changed. So we can make it 100% the responsibility of the developer, if (God forbid) anyone else ever needs to make another existing single field multiple. (edit: opened #9634)

[cmbz]

Added 5.14 milestone to reflect dependency.

[cmbz]

Moved item to Needs Sizing because issue must be resolved for 5.14 release.

[poikilotherm]

Please note @cmbz : there is already a PR and it's sized. IMHO we can just inherit that size.