fix(deps): update module github.com/prometheus/client_golang to v1.20.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/prometheus/client_golang	v1.20.2 -> v1.20.3

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Release Notes

prometheus/client_golang (github.com/prometheus/client_golang)

v1.20.3

Compare Source

• [BUGFIX] histograms: Fix possible data race when appending exemplars. #​1608

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (33c9152) to head (aef0fbb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #5788     +/-   ##
=======================================
- Coverage   84.6%   84.5%   -0.1%     
=======================================
  Files        272     272             
  Lines      22759   22759             
=======================================
- Hits       19255   19253      -2     
- Misses      3164    3166      +2     
  Partials     340     340             

see 1 file with indirect coverage changes