fix: close temp file

[testwill]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 25.14%. Comparing base (984071d) to head (b6fc6ee).
Report is 1 commits behind head on master.

Files	Patch %	Lines
server/handler/transfer_upload.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #877      +/-   ##
==========================================
- Coverage   25.15%   25.14%   -0.01%     
==========================================
  Files         196      196              
  Lines        8089     8092       +3     
==========================================
  Hits         2035     2035              
- Misses       5927     5930       +3     
  Partials      127      127              

Flag	Coverage Δ
go	25.14% <0.00%> (-0.01%)	⬇️

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[qwqcode]

Thanks