Update reactivemongo-akkastream from 1.1.0-RC14 to 1.1.0-RC15

Author: scala-steward-baeldung[bot]

build.sbt

@@ -360,7 +360,7 @@ val slickVersion = "3.5.2"
 val shapelessVersion = "2.3.12"
 val scalazVersion = "7.3.8"
 val fs2Version = "3.11.0"
-val reactiveMongo = "1.1.0-RC14"
+val reactiveMongo = "1.1.0-RC15"
 val slickPgVersion = "0.22.2"
 val scalaTestContainersVersion = "0.41.8"
 val postgresqlVersion = "42.7.5"