fix: close blob io ReadCloser

[testwill]

Thank you for contributing to Harbor!

Comprehensive Summary of your change

close blob io ReadCloser

Issue being fixed

Fixes #(issue)

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.50%. Comparing base (b7b8847) to head (5913d44).
Report is 117 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20225      +/-   ##
==========================================
- Coverage   67.56%   67.50%   -0.07%     
==========================================
  Files         991      998       +7     
  Lines      109181   110098     +917     
  Branches     2719     2724       +5     
==========================================
+ Hits        73768    74319     +551     
- Misses      31449    31795     +346     
- Partials     3964     3984      +20     

Flag	Coverage Δ
unittests	67.50% <100.00%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/controller/artifact/annotation/v1alpha1.go	66.07% <100.00%> (+1.25%)	⬆️

... and 508 files with indirect coverage changes

[MinerYang]

Hi @testwill ,

Appreciate your contribution!
May I know which lint/tools you are using to find this disclosure OR just get it manually?

Best,
Miner

[testwill]

just get it manually

[wy65701436]

lgtm

[chlins]

lgtm