build(deps): bump external/bpf_conformance from 62e3f49 to 7a773b3 (

vbpf#552)

Bumps [external/bpf_conformance](https://github.com/Alan-Jowett/bpf_conformance) from `62e3f49` to `7a773b3`.
- [Release notes](https://github.com/Alan-Jowett/bpf_conformance/releases)
- [Commits](Alan-Jowett/bpf_conformance@62e3f49...7a773b3)

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

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