Files for Unit 2 - Content types need to be combined / renamed

The content that is here: https://salsa-digital.gitbook.io/govcms-content-administration/unit-2-more-about-govcms/untitled-2
Seems to be a combination of a couple of files names untitled and untitled-2

Need to combine to a single file called something like content-types.md Changes for the file are ready to be submitted for review