chore: upgrade to SOPS v3.8.0

[devstein]

Closes #200

Description

Updates KSOPS to use SOPS v3.8.0

Uses the automated script to update for the new SOPS repository

find /path/to/repo -type f \( -name "*.go" -o -name "go.mod" \) -exec sed -i '' 's|go.mozilla.org/sops/v3|github.com/getsops/sops/v3|g' {} \;