Don't process body when update/get return code valid

[lubo-svk]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (3200d43) 67.07% compared to head (e50054a) 67.04%.

Files	Patch %	Lines
pkg/net/coap/client.go	14.28%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #413      +/-   ##
==========================================
- Coverage   67.07%   67.04%   -0.04%     
==========================================
  Files          80       80              
  Lines        5492     5496       +4     
==========================================
+ Hits         3684     3685       +1     
- Misses       1392     1394       +2     
- Partials      416      417       +1     

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[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

33.3% Coverage
0.0% Duplication

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