v2.15.1

Changelog

• d297409 docs: Add section on understanding chezmoi's files and directories
• cd74d0c docs: Document KeepassXC with YubiKey limitations
• f0817a0 docs: Fix path to config file template
• 462e547 docs: Tidy up KeepassXC reference documentation
• 6cd2766 feat: Use diff.command for all verbose output
• 58c458c fix: Fix apply --verbose when diff.command is set
• f45b73a fix: Fix concurrent map writes on sourcestate.ignoredRelPaths
• 95d5298 fix: Ignore exit status 1 from external diff commands