throw exception from diff-changelog when failure occurs (DAT-17623)

[StevenMassaro]

Impact

• Bug fix (non-breaking change which fixes expected existing functionality)
• Enhancement/New feature (adds functionality without impacting existing logic)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Throw exception from diff-changelog, so that it does not exit successfully when an exception occurs.

Things to be aware of

Things to worry about

Additional Context