Merge pull request #2674 from scala-steward/update/trees_2.13-4.8.15

Update trees_2.13 to 4.8.15

Author: tgodzik

project/deps.sc

@@ -86,7 +86,7 @@ object Deps {
     def coursierM1Cli        = coursierDefault
     def jsoniterScala        = "2.23.2"
     def jsoniterScalaJava8   = "2.13.5.2"
-    def scalaMeta            = "4.8.14"
+    def scalaMeta            = "4.8.15"
     def scalaNative          = "0.4.16"
     def scalaPackager        = "0.1.29"
     def signingCli           = "0.2.3"