v5.0.1

What's Changed

• fix: use AWS ECR mirror for busybox to avoid Docker Hub rate limits (1366442)
• docs: update README with dns-readiness input and latest version v2 (b7eceaf)
• feat: add dns-readiness input to verify DNS resolution during setup (f565d74)
• ci: add CoreDNS readiness check before DNS tests (b9489cd)
• chore: unify CI and release workflows across setup-* repos (d5f62db)
• Add internet connectivity test to CI workflow (5dfc02a)
• chore: bump actions/checkout to v6 (ce58183)
• chore: further unify coding style with other setup-* actions (38849f2)
• chore: unify coding style with other setup-* actions (05150e8)
  Full Changelog: v5...v5.0.1