v1.6.1

All changes

• Update golang.org/x/net version (#122, @blackpiglet)
• Bump up Golang to v1.18.10 (#121, @blackpiglet)
• Fix CVEs reported by trivy scanner (#117, @blackpiglet)
• Pin Golang and Busybox docker image to sha256 tag (#112, @blackpiglet)
• Replace restic reference (#105, @blackpiglet)
• Support credential setting for VSL. (#104, @blackpiglet)
• Upgrade golang version to v1.18 (#103, @blackpiglet)