Indicate software field allows free text

[KellyStathis]

Purpose

closes: https://github.com/datacite/community-ops/issues/320

Approach

Open Questions and Pre-Merge TODOs

We need to update the screenshots on both pages, but I am not sure how to do this via ReadMe's new GitHub-based workflow.

After merge:

• Update screenshot with this image:

Learning

Types of changes

• Bug fix (non-breaking change which fixes an issue)

• New feature (non-breaking change which adds functionality)

• Breaking change (fix or feature that would cause existing functionality to change)

Reviewer, please remember our guidelines:

• Be humble in the language and feedback you give, ask don't tell.
• Consider using positive language as opposed to neutral when offering feedback. This is to avoid the negative bias that can occur with neutral language appearing negative.
• Offer suggestions on how to improve code e.g. simplification or expanding clarity.
• Ensure you give reasons for the changes you are proposing.

[KellyStathis]

Uploaded the image to a hidden page and updated the link in both files, as suggested by ReadMe support