v3.8.8

What’s Changed

• Armeria retry (#1658) @Pask423
• Set the content length, when explicitly specified, in HttpClient based backends (#1696) @adamw
• Adds method and optional status Labels to PrometheusBackend (#1651) @kevinmeredith

Dependency updates

• Update scalatest-flatspec, ... to 3.2.15 (#1694) @softwaremill-ci
• Update opentelemetry-api, ... to 1.22.0 (#1693) @softwaremill-ci
• Update scribe to 3.10.6 (#1692) @softwaremill-ci
• Update http4s-client to 0.23.17 (#1690) @softwaremill-ci
• Update sbt to 1.8.2 (#1691) @softwaremill-ci
• Update http4s-blaze-client, http4s-client to 0.22.15 (#1689) @softwaremill-ci