update to current golang.org/x/sys and golang.org/x/net revision

[qiangxuhui]

go get -d golang.org/x/sys@d48e67d0026122f55f22f0df396e7a51d2b20fb9
go get -d golang.org/x/net@83b083e8dc8b4507e702ce59208711115b23ec25
go mod tidy

This brings in linux/loong64 support.

Test result:

root@upstream:~/qiangxuhui/golang_demo/dns# go test
PASS
ok  	github.com/miekg/dns	1.212s