Fix leaked client transport on copy

[gmlewis]

Fixes: #3043.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (9231a0f) 97.71% compared to head (9424530) 97.69%.
Report is 2 commits behind head on master.

Files	Patch %	Lines
github/code-scanning.go	75.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #3051 +/- ##
==========================================
- Coverage 97.71% 97.69% -0.03% 
==========================================
Files 152 152 Lines 13241 13253 +12 ==========================================
+ Hits 12939 12948 +9 - Misses 213 215 +2 - Partials 89 90 +1 

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[gmlewis]

Awaiting LGTM+Approval from any other contributor to this repo before merging.

[fchimpan]

Hi, @gmlewis !
Thank you for your implementation.
I have tested it in my local environment and can confirm that it is working correctly.
LGTM 🚀

[gmlewis]

Thank you, @fchimpan !
Merging.