ARIA-419: Fix typo in hello-world example instructions in website's g…

…etting-started.md

gettingstarted.md

@@ -124,7 +124,7 @@ This section will describe how to run a simple "Hello World" example.
 First, provide ARIA TOSCA with the ARIA TOSCA"hello world" template (can be downloaded [here](https://github.com/apache/incubator-ariatosca/tree/master/examples/hello-world)) service-template and name it (e.g.
 ``my-service-template``):
 
-    aria service-templates store examples/hello-world/helloworld.yaml my-service-template
+    aria service-templates store examples/hello-world/hello-world.yaml my-service-template
 
 Now create a service based on this service-template and name it (e.g. ``my-service``):