skip fp16a gpu test

[nihui]

No description provided.

[tencent-adm]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.12%. Comparing base (f74639d) to head (6219cda).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6820   +/-   ##
=======================================
  Coverage   95.12%   95.12%           
=======================================
  Files         947      947           
  Lines      416622   416612   -10     
=======================================
+ Hits       396307   396313    +6     
+ Misses      20315    20299   -16     

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[chatgpt-codex-connector]

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