Adding label Business logic change info to handbook - Update sites/handbook/source/handbook/business-technology/data-team/how-we-work/index.html.md.erb

Why is this change being made?

Business logic change label is applied for any changes such as adding new dimensions, facts, marts, changing joins, adding new calculated fields.

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
• Assign this change to the correct DRI
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the "Maintained by" section in on the page being edited.
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies.