fix lintian warnings in debian/changelog
fix lintian warnings in debian/changelog

W: github-backup-utils: syntax-error-in-debian-changelog line 144 "found trailer where expected start of change data"
W: github-backup-utils: syntax-error-in-debian-changelog line 155 "found trailer where expected start of change data"
W: github-backup-utils: syntax-error-in-debian-changelog line 160 "found trailer where expected start of change data"
W: github-backup-utils: syntax-error-in-debian-changelog line 45 "badly formatted trailer line"
W: github-backup-utils: syntax-error-in-debian-changelog line 47 "found start of entry where expected more change data or trailer"

github/backup-utils,github/backup-utils