Bump Prometheus.Client to 6.3.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Prometheus.Client (source)	6.2.0 → 6.3.0

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Release Notes

prom-client-net/prom-client (Prometheus.Client)

v6.3.0

• Added onObserveException overloads to ObserveDuration (#​396)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.14%. Comparing base (5f4fce2) to head (4ab0df7).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #188   +/-   ##
=======================================
  Coverage   40.14%   40.14%           
=======================================
  Files           6        6           
  Lines         137      137           
  Branches       35       35           
=======================================
  Hits           55       55           
  Misses         80       80           
  Partials        2        2           

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