[chore]: Bump github.com/miekg/dns from 1.1.50 to 1.1.51 (#1566)

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.50 to 1.1.51.
- [Release notes](https://github.com/miekg/dns/releases)
- [Changelog](https://github.com/miekg/dns/blob/master/Makefile.release)
- [Commits](https://github.com/miekg/dns/compare/v1.1.50...v1.1.51)

---
updated-dependencies:
- dependency-name: github.com/miekg/dns
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/github.com/miekg/dns/labels.go

@@ -122,7 +122,7 @@ func Split(s string) []int {
 }
 
 // NextLabel returns the index of the start of the next label in the
-// string s starting at offset.
+// string s starting at offset. A negative offset will cause a panic.
 // The bool end is true when the end of the string has been reached.
 // Also see PrevLabel.
 func NextLabel(s string, offset int) (i int, end bool) {