Update Custom Field Configurations

Update the configuration for contexts of a custom field of a [type](https://developer.atlassian.com/platform/forge/manifest-reference/modules/jira-custom-field-type/) created by a [Forge app](https://developer.atlassian.com/platform/forge/).**[Permissions](#permissions) required:** *Administer Jira* [global permission](https://confluence.atlassian.com/x/x4dKLg). Jira permissions are not required for the Forge app that created the custom field type.