go.mod: bump golang.org/x/sys from 0.38.0 to 0.39.0

Bumps [golang.org/x/sys](https://github.com/golang/sys) from 0.38.0 to 0.39.0.
- [Commits](golang/sys@v0.38.0...v0.39.0)

---
updated-dependencies:
- dependency-name: golang.org/x/sys
  dependency-version: 0.39.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -2,4 +2,4 @@ module github.com/tklauser/ps
 
 go 1.24.0
 
-require golang.org/x/sys v0.38.0
+require golang.org/x/sys v0.39.0

go.sum

@@ -1,2 +1,2 @@
-golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
-golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
+golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=