Update zio, zio-test, zio-test-sbt to 2.1.21 in base#48

scala-steward wants to merge 1 commit intoEffectOrientedProgramming:baseEffectOrientedProgramming/examples:basefrom

scala-steward:update/base/zio-2.1.21scala-steward/examples:update/base/zio-2.1.21Copy head branch name to clipboard