Add automatic changelog generation in release workflow

[spencerugbo]

Proposed changes

This PR aims to add automatic changelog generation whenever the release workflow is ran.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

[dhurley]

Since we are always creating a new commit for the updated changelog for each release, then we will always have to create a PR to merge back into main. At the top of this file there is an input called createPullRequest, which we use to determine if we want to automatically create a PR back to main or not. I think you can remove this input and have it that the workflow always creates a PR.

[github-actions]

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