message: docs: fixed server stats docs
diff: @@ -21,8 +21,8 @@ Server related statistics are rooted at *server.* with following statistics:
  :widths: 1, 1, 2
  uptime, Gauge, Current server uptime in seconds
  - memory_allocated, Gauge, Current amount of allocated memory in bytes
  - memory_heap_size, Gauge, Current reserved heap size in bytes
  + memory_allocated, Gauge, Current amount of allocated memory in bytes. Total of both new and old Envoy processes on hot restart.
  + memory_heap_size, Gauge, Current reserved heap size in bytes. New Envoy process heap size on hot restart.
  live, Gauge, "1 if the server is not currently draining, 0 otherwise"
  parent_connections, Gauge, Total connections of the old Envoy process on hot restart
  total_connections, Gauge, Total connections of both new and old Envoy processes
  