Fix Backstage labels for basic backstage template (#209)

Signed-off-by: Daniel Bodky <[email protected]>

Author: mocdaniel

examples/ref-implementation/backstage-templates/entities/basic/skeleton/manifests/deployment.yaml

@@ -15,6 +15,7 @@ spec:
     metadata:
       labels:
         app: nginx
+        entity-id: ${{values.name}}
     spec:
       containers:
         - name: nginx