patch: use the new --json-allow-comments in patch set processor (#573)

Author: itzg

src/main/java/me/itzg/helpers/patch/PatchCommand.java

@@ -68,7 +68,8 @@ public Integer call() throws Exception {
                         new Interpolator(
                                 new StandardEnvironmentVariablesProvider(),
                                 envPrefix
-                        )
+                        ),
+                    jsonAllowComments
                 );
 
         patchSetProcessor.process(patchSet);