Bump external/libbtf from cdf441a to 9224231

Bumps [external/libbtf](https://github.com/Alan-Jowett/libbtf) from `cdf441a` to `9224231`.
- [Release notes](https://github.com/Alan-Jowett/libbtf/releases)
- [Commits](Alan-Jowett/libbtf@cdf441a...9224231)

---
updated-dependencies:
- dependency-name: external/libbtf
  dependency-version: 92242317dc0a358388e6c7ef3b1ab03e46de09a4
  dependency-type: direct:production
...

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

Author: dependabot[bot]