chore: fix release script to ensure that beta releases pass changelog check

[JamesLMilner]

Description of Changes

This should fix the changelog check script to work for beta releases

Link to Issue

No issue

PR Checklist

• [x] The PR title follows the conventional commit standard
• [ ] There is a associated GitHub issue
• [ ] If I have added significant code changes, there are relevant tests
• [ ] If there are behaviour changes these are documented