Update RESP3 reply description for SMEMBERS and SINTER commands.

[Yury-Fridlyand]

Redis returns set response for SMEMBERS and SINTER using RESP3.

$ redis-cli -3
127.0.0.1:6379> sinter s1
1~ "a"
127.0.0.1:6379> sinter s1
1~ "a"
127.0.0.1:6379> sinter s1 s2
(empty set)
127.0.0.1:6379> smembers s1
1~ "a"
127.0.0.1:6379>

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[Yury-Fridlyand]

How can I build and start the doc website locally to verify the changes?

[Yury-Fridlyand]

Oh duplicate of #2683
UPD
#2683 closed, reopening this one

[dwdougherty]

Thank you. This is being fixed on the new docs repo.