chore(deps): update dependency prometheus-client to v4.2.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
prometheus-client	4.2.1 -> 4.2.4

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Release Notes

prometheus/client_ruby (prometheus-client)

v4.2.4

Compare Source

Codename: FOSDEM 25th Anniversary Edition

Small improvements

• #​316 Use binary search for
  histogram buckets:
  This change speeds up observations in histogram metrics by using a binary search
  rather than a sequential search through the bucket array. This is possible because
  we enforce that histogram buckets are sorted at initialization.

v4.2.3

Compare Source

Codename: Now with 25% fewer test dependencies!

Small improvements

• #​308 Declare base64 gem
  dependency, ready for Ruby 3.4:
  Ruby 3.4 and above will require an explicit dependency on base64 as it will no
  longer be included with CRuby. This gets us ready for that change.

v4.2.2

Compare Source

Codename: 🎃🦇 Spooky type conversion 🦇🎃

Bug fixes

• #​296 Stringify non-string job
  names in push client:
  Previously, an error would be raised if you passed a symbol as the job name, which
  is inconsistent with how we handle label values in the rest of the client. This
  change converts the job name to a string before trying to use it.
• #​297 Stringify grouping key
  values in push client:
  Same thing as #​296, but for grouping key values.

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