build(deps): bump github.com/KimMachineGun/automemlimit

Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.4.0 to 0.5.0.
- [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.4.0...v0.5.0)

---
updated-dependencies:
- dependency-name: github.com/KimMachineGun/automemlimit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/pbnjay/memory/memsysctl.go

@@ -0,0 +1,21 @@
+// +build darwin freebsd openbsd dragonfly netbsd
+
+package memory
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func sysctlUint64(name string) (uint64, error) {
+	s, err := syscall.Sysctl(name)
+	if err != nil {
+		return 0, err
+	}
+	// hack because the string conversion above drops a \0
+	b := []byte(s)
+	if len(b) < 8 {
+		b = append(b, 0)
+	}
+	return *(*uint64)(unsafe.Pointer(&b[0])), nil
+}