Update swift-package-init-lib to match new Testing output for suites from swiftlang/swift-testing#1116 (#159) (#161)

Author: finagolfin

swift-package-init-lib.md

@@ -42,7 +42,7 @@ RUN: %{FileCheck} --check-prefix CHECK-SWIFT-TESTING-LOG --input-file %t.swift-t
 
 ```
 CHECK-SWIFT-TESTING-LOG: Test run started.
-CHECK-SWIFT-TESTING-LOG: Test run with 1 test passed after {{.*}} seconds.
+CHECK-SWIFT-TESTING-LOG: Test run with 1 test in 0 suites passed after {{.*}} seconds.
 ```
 
 ## Check there were no compile errors or warnings.