chore: update release info

[barmac]

Proposed Changes

This PR updates the release info for v5.31.0 according to the suggestions (1, 2). I've also removed the placeholder-like part about bug fixes as it was anyway hidden below the fold, so a user would have to scroll to see it.

Related to #4753

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[nikku]

Let's rework the run-time versions part as discussed here to make it more actionable for end users. CC @jarekdanielak to contribute link to documentation.

Consider to also link form changes from documentation, if documentation exists.

[barmac]

Consider to also link form changes from documentation, if documentation exists.

I will add a link but it will be dead until camunda/camunda-docs#4773 is released.

[nikku]

I will add a link but it will be dead until camunda/camunda-docs#4773 is released.

Fine by me.

[barmac]

OK I've added the links with the query params to track source. The screenshots in the top comment are up to date.

[barmac]

I'm merging this and building the release, so that we can unfreeze main.

[nikku]

Thanks, really nice follow-up improvements 👏