fix: align the build dir name in ignore file

[Ning Tang (tecton)]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.25%. Comparing base (6e4621d) to head (407ce5d).

Additional details and impacted files

@@             Coverage Diff              @@
##           release/6.7   #15540   +/-   ##
============================================
  Coverage        89.25%   89.25%           
============================================
  Files              620      620           
  Lines            38088    38088           
  Branches          7558     7521   -37     
============================================
  Hits             33997    33997           
  Misses            1985     1985           
  Partials          2106     2106           

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