Fix CI failure in [test_windows_full]

Author: nicolasstucki

tests/run-custom-args/tasty-inspector/tastyPaths.scala

@@ -1,6 +1,8 @@
 import scala.quoted._
 import scala.tasty.inspector._
 
+import java.io.File.separator
+
 opaque type PhoneNumber = String
 
 case class I8163() {
@@ -23,7 +25,7 @@ object Test {
 class TestInspector() extends Inspector:
 
   def inspect(using Quotes)(tastys: List[Tasty[quotes.type]]): Unit =
-    println(tastys.map(_.path.split("/tasty-inspector/").last))
+    println(tastys.map(_.path.split(s"${separator}tasty-inspector$separator").last))
     try
       quotes.reflect.SourceFile.current
       assert(false)