Bump external/ebpf-verifier from c374c31 to c31d60b (#4645)

Bumps [external/ebpf-verifier](https://github.com/vbpf/ebpf-verifier) from `c374c31` to `c31d60b`.
- [Release notes](https://github.com/vbpf/ebpf-verifier/releases)
- [Commits](vbpf/prevail@c374c31...c31d60b)

---
updated-dependencies:
- dependency-name: external/ebpf-verifier
  dependency-version: c31d60b95b3a74f3c49257762ce372d3f7f2829d
  dependency-type: direct:production
...

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

Author: dependabot[bot]