CI: Trigger mdformat hook on *.md file change

• Trigger pre-commit:hooks job when *.md file changes
• simplify files matching rules
• fix changelog with mdformat

changed milestone to %1.2.0

added CI/CD Dev Env labels

assigned to @moul

added 3 commits

• 64079233 - ci: simplify files matching rules
• 015192d0 - ci: Trigger pre-commit:hooks job when *.md file changes
• e6184c51 - fix changelog with mdformat

Compare with previous version

requested review from @vtexier

approved this merge request

merged