Fix copying xcpp.data for xeus-cpp-lite deploy page

[anutosh491]

Description

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See compiler-research/xeus-cpp#200

Type of change

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• Bug fix
• New feature
• Requires documentation updates

Testing

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Checklist

• I have read the contribution guide recently

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.87%. Comparing base (91c6eda) to head (8f9bb49).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #411   +/-   ##
=======================================
  Coverage   70.87%   70.87%           
=======================================
  Files           9        9           
  Lines        3533     3533           
=======================================
  Hits         2504     2504           
  Misses       1029     1029