fix: format client.go with gofmt

[zx06]

Fix gofmt / goimports format issue in client.go

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 83.00%. Comparing base (92ec358) to head (24826de).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/ssh/client.go	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   82.86%   83.00%   +0.13%     
==========================================
  Files          46       46              
  Lines        3706     3706              
==========================================
+ Hits         3071     3076       +5     
+ Misses        476      473       -3     
+ Partials      159      157       -2     

Flag	Coverage Δ
e2e	47.02% <ø> (ø)
integration	47.02% <ø> (ø)
unittests	71.31% <50.00%> (+0.13%)	⬆️

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