Fix syntax highlight (istio#132)

Signed-off-by: Liam White <[email protected]>

Author: liamawhite

install/dataplane/v1alpha1/spec.pb.go

@@ -18,7 +18,7 @@ syntax = "proto3";
 // metadata:
 //   name: bookinfo
 //   namespace: bookinfo
-// spec:
+// spec: {}
 //```
 //
 // To configure infrastructure specific settings such as the service type, set the relevant

install/dataplane/v1alpha1/spec.proto

@@ -13,7 +13,7 @@
 metadata:
   name: bookinfo
   namespace: bookinfo
-spec:
+spec: {}
 </code></pre>
 
 <p>To configure infrastructure specific settings such as the service type, set the relevant