docs(s2n-quic): add a comment about docke+GSO #5411

Job	Run time
s2n-quic-qns (debug)	2m 32s
env	6s
s2n-quic-qns (release)	4m 45s
perf (s2n-quic, s2n-quic)	1m 30s
perf (s2n-quic-null, s2n-quic-null)	50s
h3spec (s2n-tls)	15s
attack (udp)	5m 25s
h3spec (rustls)	19s
interop (aioquic, s2n-quic)	20m 41s
interop (chrome, s2n-quic)	5m 22s
interop (go-x-net, s2n-quic)	13m 49s
interop (kwik, s2n-quic)	6m 58s
interop (lsquic, s2n-quic)	14m 47s
interop (msquic, s2n-quic)	18m 59s
interop (mvfst, s2n-quic)	13m 37s
interop (neqo, s2n-quic)	17m 16s
interop (ngtcp2, s2n-quic)	16m 34s
interop (picoquic, s2n-quic)	16m 23s
interop (quic-go, s2n-quic)	14m 51s
interop (quiche, s2n-quic)	19m 19s
interop (quinn, s2n-quic)	16m 50s
interop (s2n-quic, aioquic)	15m 4s
interop (s2n-quic, go-x-net)	11m 32s
interop (s2n-quic, haproxy)	11m 51s
interop (s2n-quic, kwik)	5m 38s
interop (s2n-quic, lsquic)	13m 8s
interop (s2n-quic, msquic)	14m 36s
interop (s2n-quic, mvfst)	18m 15s
interop (s2n-quic, neqo)	14m 42s
interop (s2n-quic, nginx)	10m 39s
interop (s2n-quic, ngtcp2)	13m 49s
interop (s2n-quic, picoquic)	14m 40s
interop (s2n-quic, quic-go)	13m 42s
interop (s2n-quic, quiche)	12m 23s
interop (s2n-quic, quinn)	14m 25s
interop (s2n-quic, s2n-quic)	14m 41s
interop (s2n-quic, s2n-quic-rustls)	14m 8s
interop (s2n-quic, xquic)	5m 24s
interop (s2n-quic-rustls, s2n-quic)	14m 48s
interop (xquic, s2n-quic)	9m 9s
perf-report	12s
interop-report	19s
	7h 34m 13s

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