build(deps): bump golang.org/x/sys from 0.3.0 to 0.4.0

Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/golang/sys/releases)
- [Commits](https://github.com/golang/sys/compare/v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: golang.org/x/sys
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/golang.org/x/sys/unix/syscall_openbsd.go

@@ -220,6 +220,7 @@ func Uname(uname *Utsname) error {
 //sys	Chmod(path string, mode uint32) (err error)
 //sys	Chown(path string, uid int, gid int) (err error)
 //sys	Chroot(path string) (err error)
+//sys	ClockGettime(clockid int32, time *Timespec) (err error)
 //sys	Close(fd int) (err error)
 //sys	Dup(fd int) (nfd int, err error)
 //sys	Dup2(from int, to int) (err error)