Minor fixes in BUILD files.

Change-Id: I47eefbb9514fd89c7ac19c78659e98ab7e6cc7f9
diff --git a/protocols/grpc/BUILD b/protocols/grpc/BUILD
index a01155b..26e178c 100644
--- a/protocols/grpc/BUILD
+++ b/protocols/grpc/BUILD
@@ -34,7 +34,7 @@
 
 onos_app(
     app_name = "org.onosproject.protocols.grpc",
-    category = "rotocol",
+    category = "Protocol",
     description = "Exposes APIs to operate with gRPC channels",
     included_bundles = BUNDLES,
     title = "gRPC Protocol Subsystem",