message: replace `binary` with `binary program`
diff: # Envoy Stats System
  Envoy statistics track numeric metrics on an Envoy instance, optionally spanning
  -binary restarts. The metrics are tracked as:
  +binary program restarts. The metrics are tracked as:
  * Counters: strictly increasing 64-bit integers.
  * Gauges: 64-bit integers that can rise and fall.
  * Histograms: mapping ranges of values to frequency. The ranges are auto-adjusted as
  data accumulates. Unliked counters and gauges, histogram data is not retained across
  - binary restarts.
  + binary program restarts.
  ## Hot-restart: `RawStatData` vs `HeapStatData`
  -In order to support restarting the Envoy binary without losing counter and gauge
  +In order to support restarting the Envoy binary program without losing counter and gauge
  values, they are stored in a shared-memory block, including stats that are
  created dynamically at runtime in response to discovery of new clusters at
  runtime. To simplify memory management, each stat is allocated a fixed amount
  