fix(deps): update dependency prometheus-client to v0.18.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
prometheus-client	0.17.1 -> 0.18.0

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Release Notes

prometheus/client_python (prometheus-client)

v0.18.0: 0.18.0 / 2023-10-30

Compare Source

[CHANGE] Remove support for Python versions < 3.8. #​936
[FEATURE] Add mostrecent aggregation to Gauge. #​967
[ENHANCEMENT] Typing improvements. #​935, #​970
[ENHANCEMENT] Allow enabling or disabling _created metrics from code. #​973
[BUGFIX] Change #!/usr/bin/python to #!/usr/bin/env python in remaining places. #​945

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