hv_sock: update outdated comment for renamed vsock_stream_recvmsg()

hv_sock: update outdated comment for renamed vsock_stream_recvmsg()

The function vsock_stream_recvmsg() was renamed to
vsock_connectible_recvmsg() by commit a9e29e5511b9 ("af_vsock:
update functions for connectible socket").  Update the comment
accordingly.

Assisted-by: unnamed:deepseek-v3.2 coccinelle
Signed-off-by: Kexin Sun <kexinsun@smail.nju.edu.cn>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260321105753.6751-1-kexinsun@smail.nju.edu.cn
Signed-off-by: Paolo Abeni <pabeni@redhat.com>