change "Uncontrolled path" to "Path concatenation"

Author: erik-krogh

javascript/ql/src/semmle/javascript/security/dataflow/UnsafeShellCommandConstructionCustomizations.qll

@@ -204,7 +204,7 @@ module UnsafeShellCommandConstruction {
       joinCall = isExecutedAsShellCommand(DataFlow::TypeBackTracker::end(), sys)
     }
 
-    override string getSinkType() { result = "Uncontrolled path" }
+    override string getSinkType() { result = "Path concatenation" }
 
     override SystemCommandExecution getCommandExecution() { result = sys }