Python: Fix sneaky semantic change

Co-authored-by: Rasmus Wriedt Larsen <rasmuswriedtlarsen@gmail.com>

python/ql/src/Security/CWE-327/Ssl.qll

@@ -19,6 +19,7 @@ class SSLContextCreation extends ContextCreation, DataFlow::CallCfgNode {
     )
     or
     not exists(this.getArg(_)) and
+    not exists(this.getArgByName(_)) and
     result = "TLS"
   }
 }