feat(decap): add first and last name fields to decap_cms_config.yaml (#3092)

modules/blox-plugin-decap-cms/data/decap_cms_config.yaml

@@ -14,6 +14,8 @@ collections:
     create: true  # Allow users to create new documents in this collection
     fields:  # The fields each document in this collection have
       - {label: "Display name (such as your full name)", name: "title", widget: "string"}
+      - {label: "First name", name: "first_name", widget: "string", required: false}
+      - {label: "Last name", name: "last_name", widget: "string", required: false}
       - {label: "Position or tagline (such as Professor of AI)", name: "role", widget: "string", required: false}
       - label: "Avatar (upload an image named `avatar.jpg/png`)"
         name: "avatar_filename"