Bump markdown-cli to v0.39.0

[regularfry]

software-engineering-quality-framework/scripts/markdown-check-format.sh

Line 16 in 3659ffd

image=ghcr.io/igorshubovych/markdownlint-cli@sha256:df7ce7cdcdb525d52a89d7aab17c507d49adceaddf2b767d3ed799c9537ded80 # v0.32.2

wants bumping to v0.39.0. That should squash the punycode deprecation warnings in the output.