add handleDeployment warn log

[jingliming]

Ⅰ. Describe what this PR does

handleDeployment function missed warning log

Ⅱ. Does this pull request fix one issue?

no

Ⅲ. Special notes for reviews

add handleDeployment warn log

[kruise-bot]

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[kruise-bot]

Welcome @jingliming! It looks like this is your first PR to openkruise/rollouts 🎉

[codecov-commenter]

Codecov Report

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

Project coverage is 45.44%. Comparing base (76d33b8) to head (d9d5dc8).
Report is 16 commits behind head on master.

Files	Patch %	Lines
...bhook/workload/mutating/workload_update_handler.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #175      +/-   ##
==========================================
+ Coverage   43.87%   45.44%   +1.56%     
==========================================
  Files          50       52       +2     
  Lines        5374     6518    +1144     
==========================================
+ Hits         2358     2962     +604     
- Misses       2618     3068     +450     
- Partials      398      488      +90     

Flag	Coverage Δ
unittests	45.44% <0.00%> (+1.56%)	⬆️

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