fix comment for parameters end_stream of decodeData/encodeData. (#14620)
fix comment for parameters end_stream of decodeData/encodeData. (#14620)

Signed-off-by: wangfakang <e52befb7ccd637263696cf34d1a967b679acf7cc@gmail.com>
envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,lyft/envoy,lyft/envoy,envoyproxy/envoy