Update Software references page

[naushinthomson]

• [x] Revise page from feedback rounds (add query to ask authors for more info for software refs, clarify packages mentioned in passing as below need to be added)
• [x] clarify what to do for cases like these (57578): (leave AQ to ask for author list/year, we don't expect them to spend ages working out the ref details)
• [x] Becky approved page
• [x] Melissa approved page
• [x] Fred approved page
• [x] James approved page
• [x] Naushin approved page
• [x] Share page with Exeter

Definition of done

• [x] Updates completed
• [x] Team reviewed and approved page?
• [x] Assign Fred to update the Schematron