Bump external/bpf_conformance from 6356e3e to 22b6df4

Bumps [external/bpf_conformance](https://github.com/Alan-Jowett/bpf_conformance) from `6356e3e` to `22b6df4`.
- [Release notes](https://github.com/Alan-Jowett/bpf_conformance/releases)
- [Commits](Alan-Jowett/bpf_conformance@6356e3e...22b6df4)

---
updated-dependencies:
- dependency-name: external/bpf_conformance
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>