On custom model and field names page, consider adding line highlighting in the code examples

[andrew-walford-prisma]

IMO, the examples on https://www.prisma.io/docs/concepts/components/prisma-client/working-with-prismaclient/use-custom-model-and-field-names would be a bit easier to follow if we highlighted the relevant lines. For example, in the section https://www.prisma.io/docs/concepts/components/prisma-client/working-with-prismaclient/use-custom-model-and-field-names, the changed lines in the second code block could be highlighted.