docs(DragAndDrop): fix docs title

[matthewgallo]

Small fix to update incorrect page title for Drag and drop example.

What did you change?

packages/ibm-products/src/components/DragAndDrop/DragAndDrop.mdx

How did you test and verify your work?

Storybook

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.80%. Comparing base (1174a16) to head (75d6a2c).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6587   +/-   ##
=======================================
  Coverage   80.80%   80.80%           
=======================================
  Files         395      395           
  Lines       12876    12876           
  Branches     4266     4266           
=======================================
+ Hits        10404    10405    +1     
+ Misses       2472     2471    -1     

Components	Coverage Δ
ibm-products	∅ <ø> (∅)
ibm-products-web-components	∅ <ø> (∅)