The header of your record pages will always show the primary field value for your workflow. This means that if you have a workflow field (e.g. "Risk Name," "Obligation Title," etc.) set as your workflow's primary field, that record's field value will show up as the header.
You can set a primary field on your Workflow by navigating to the canvas for your Application and opening up the Workflow edit modal by either:
Double-clicking on the background of a Workflow
Clicking on the ⚙️ > Edit on a Workflow
From there, set your primary field.