Update OATS Redis assertions

Update attribute names.

Author: martincostello

docker/docker-compose-aspnetcore/oats.yaml

@@ -72,7 +72,8 @@ expected:
           attributes:
             db.statement: LPUSH
             db.system: redis
-            net.peer.name: redis
+            db.redis.database_index: '0'
+            server.address: redis
     - traceql: '{ span.http.route =~ "/api/todo/items/" }'
       spans:
         - name: 'main'