Update cats, circe to 4.0.15

Author: scala-steward

examples/src/main/scala/sttp/tapir/examples/errors/errorAsJson.scala

@@ -6,7 +6,7 @@
 //> using dep org.apache.pekko::pekko-http:1.0.1
 //> using dep org.apache.pekko::pekko-stream:1.0.3
 //> using dep com.softwaremill.sttp.client4::core:4.0.0-RC3
-//> using dep com.softwaremill.sttp.client4::circe:4.0.13
+//> using dep com.softwaremill.sttp.client4::circe:4.0.15
 
 package sttp.tapir.examples.errors
 

examples/src/main/scala/sttp/tapir/examples/security/OAuth2GithubHttp4sServer.scala

@@ -3,7 +3,7 @@
 //> using dep com.softwaremill.sttp.tapir::tapir-core:1.13.6
 //> using dep com.softwaremill.sttp.tapir::tapir-http4s-server:1.13.6
 //> using dep com.softwaremill.sttp.tapir::tapir-json-circe:1.13.6
-//> using dep com.softwaremill.sttp.client4::cats:4.0.13
+//> using dep com.softwaremill.sttp.client4::cats:4.0.15
 //> using dep org.http4s::http4s-blaze-server:0.23.16
 //> using dep com.github.jwt-scala::jwt-circe:10.0.1