Refresh Windows process PATH before duplicate check

tests/release_scripts.rs

@@ -239,6 +239,12 @@ fn windows_installer_adds_user_path_idempotently() {
     assert!(ps1.contains("(@($entries) + $PathToAdd) -join ';'"));
     assert!(ps1.contains("(\";$env:Path;\").Contains(\";$PathToAdd;\")"));
     assert!(ps1.contains("$env:Path = \"$PathToAdd;$env:Path\""));
+    assert!(
+        ps1.find("(\";$env:Path;\").Contains(\";$PathToAdd;\")")
+            .unwrap()
+            < ps1.find("foreach ($entry in $entries)").unwrap(),
+        "Windows installer must refresh the current shell PATH even when user PATH already contains Dosh"
+    );
     assert!(
         !ps1.contains("\"$userPath;$bindir\""),
         "Windows installer must not write a leading semicolon when user PATH is empty"