Update coursier to 2.1.21

Author: scala-steward

build.sbt

@@ -14,7 +14,7 @@ ThisBuild / versionScheme := Some("early-semver")
 
 val protobufJava = "com.google.protobuf" % "protobuf-java" % "3.25.5"
 
-val coursierVersion = "2.1.19"
+val coursierVersion = "2.1.21"
 
 lazy val bridge: Project = project
   .in(file("bridge"))