C#: Align comments and actual test case.

Author: michaelnebel

csharp/ql/integration-tests/all-platforms/dotnet_run/test.py

@@ -26,7 +26,7 @@ def check_build_out(msg, s):
 check_build_out("Default reply", s)
 
 # one argument, but `--`
-s = run_codeql_database_create_stdout(['dotnet clean', 'rm -rf test3-db', 'dotnet run hello'], "test4-db")
+s = run_codeql_database_create_stdout(['dotnet clean', 'rm -rf test3-db', 'dotnet run -- hello'], "test4-db")
 check_build_out("Default reply", s)
 
 # two arguments, no `--`