Update http4s-blaze-client to 0.23.15

[softwaremill-ci]

Updates org.http4s:http4s-blaze-client from 0.23.14 to 0.23.15.
GitHub Release Notes - Version Diff

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

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Adjust future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.http4s", artifactId = "http4s-blaze-client" } ]

Or, add this to slow down future updates of this dependency:

dependencyOverrides = [{
  pullRequests = { frequency = "30 days" },
  dependency = { groupId = "org.http4s", artifactId = "http4s-blaze-client" }
}]

labels: library-update, early-semver-minor, semver-spec-patch, version-scheme:early-semver, commit-count:1