Fix Pre-Release Workflow Reference

[bryanculver]

Closes: #DNE

What's Changed

v2.0.0-beta.2 failed due to using the ci_integration.yml workflow from main which isn't compatible with the upcoming changes in next, which are passing.

This change uses the local reference instead of main.

Test run: https://github.com/nautobot/nautobot/actions/runs/5494249038/workflow

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• Unit, Integration Tests
• Documentation Updates (when adding/changing features)
• Example Plugin Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design