Merge pull request #565 from http4s/update/series/1.x/armeria-1.31.1

Update armeria to 1.31.1 in series/1.x

build.sbt

@@ -21,7 +21,7 @@ ThisBuild / resolvers += Resolver.mavenLocal
 ThisBuild / Test / javaOptions += "-Dcom.linecorp.armeria.verboseResponses=true -Dcom.linecorp.armeria.verboseExceptions=always"
 
 val versions = new {
-  val armeria = "1.31.0"
+  val armeria = "1.31.1"
   val fs2 = "3.11.0"
   val http4s = "1.0.0-M43"
   val log4cats = "2.7.0"