Fix example directory location in CMake packaging

[godotalgorithm]

In preparing a release, I noticed that the examples directory is messed up in the packaging, and this should fix the problem.

Status

• Ready for merge

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.44%. Comparing base (2775394) to head (00a2a4c).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #309   +/-   ##
=======================================
  Coverage   69.44%   69.44%           
=======================================
  Files         339      339           
  Lines       76104    76104           
=======================================
  Hits        52848    52848           
  Misses      23256    23256           

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