nghttpx-ingress-lb v0.64.0

What's Changed

• Add tests for deleteAssetFiles by @tatsuhiro-t in #274
• Cache certificate to avoid the expensive certificate operations by @tatsuhiro-t in #275
• Enable errorlint by @tatsuhiro-t in #276
• Unexport CertificateCacheEntry by @tatsuhiro-t in #277
• Bump actions/github-script from 6 to 7 by @dependabot in #278
• Bump Kubernetes to v1.28.3 by @tatsuhiro-t in #279

Full Changelog: v0.63.0...v0.64.0