Bump external/ebpf-verifier from 68221b9 to 76acd5c (#4679)

Bumps [external/ebpf-verifier](https://github.com/vbpf/ebpf-verifier) from `68221b9` to `76acd5c`.
- [Release notes](https://github.com/vbpf/ebpf-verifier/releases)
- [Commits](vbpf/prevail@68221b9...76acd5c)

---
updated-dependencies:
- dependency-name: external/ebpf-verifier
  dependency-version: 76acd5c3000792e2310975f0837dd4cd31ad91ff
  dependency-type: direct:production
...

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