Use formatting print to show underlying error message

[kruton]

This appears to be a typo where "Println" was used instead of "Printf"

[mudler]

thanks!

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 54.30%. Comparing base (541728f) to head (ddcaef0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
collector/collector.go	25.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #500      +/-   ##
==========================================
- Coverage   54.40%   54.30%   -0.11%     
==========================================
  Files          19       19              
  Lines        1566     1569       +3     
==========================================
  Hits          852      852              
- Misses        586      587       +1     
- Partials      128      130       +2     

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