Update scalafmt.conf

Author: hugo-vrijswijk

.scalafmt.conf

@@ -20,7 +20,11 @@ newlines.topLevelStatementBlankLines = [
 onTestFailure = "To fix this, run './bin/scalafmt' from the project root directory"
 
 # Mill plugin integration-test fixtures are verbatim Mill projects, not project sources
-project.excludePaths = ["glob:**/modules/mill/src/mill-test/**"]
+project.excludePaths = [
+  "glob:**/modules/mill/src/mill-test/**",
+  "glob:**/target/**",
+  "glob:**/src_managed/*"
+]
 
 fileOverride {
   "glob:**/core/src/test/resources/scalaFiles/scala3File.scala" {