Merge pull request #322 from scala-steward/update/scalatest-3.2.15

Update scalatest to 3.2.15

Author: satabin

build.sbt

@@ -4,7 +4,7 @@ val scala212 = "2.12.17"
 val scala213 = "2.13.9"
 val scala3 = "3.2.2"
 
-val scalatestVersion = "3.2.13"
+val scalatestVersion = "3.2.15"
 val scalacheckVersion = "1.17.0"
 
 ThisBuild / scalaVersion := scala213