Bump scala-cli-signing to 0.2.8

Author: Gedochao

project/deps/package.mill.scala

@@ -128,7 +128,7 @@ object Deps {
     def maxScalaNativeForScalaPy          = scalaNative04
     def maxScalaNativeForMillExport       = scalaNative05
     def scalaPackager                     = "0.1.32"
-    def signingCli                        = "0.2.7"
+    def signingCli                        = "0.2.8"
     def signingCliJvmVersion              = Java.defaultJava
     def javaSemanticdb                    = "0.10.0"
     def javaClassName                     = "0.1.7"