build(deps): bump github.com/cilium/ebpf from 0.9.1 to 0.9.3

Bumps [github.com/cilium/ebpf](https://github.com/cilium/ebpf) from 0.9.1 to 0.9.3.
- [Release notes](https://github.com/cilium/ebpf/releases)
- [Commits](https://github.com/cilium/ebpf/compare/v0.9.1...v0.9.3)

---
updated-dependencies:
- dependency-name: github.com/cilium/ebpf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/golang.org/x/sys/unix/syscall_bsd.go

@@ -363,7 +363,7 @@ func sendmsgN(fd int, iov []Iovec, oob []byte, ptr unsafe.Pointer, salen _Sockle
 	var empty bool
 	if len(oob) > 0 {
 		// send at least one normal byte
-		empty := emptyIovecs(iov)
+		empty = emptyIovecs(iov)
 		if empty {
 			var iova [1]Iovec
 			iova[0].Base = &dummy