chore: adapted documentation for migrateDB.ts#7088

SamTV12345 merged 1 commit intodevelopether/etherpad:developfrom

7073-migratedb-script-missing-in-packagejson-in-the-official-container-imageether/etherpad:7073-migratedb-script-missing-in-packagejson-in-the-official-container-imageCopy head branch name to clipboard