Update contact.md
Update contact.md

add new lines

Former-commit-id: dd9964d7bdb31d3fc88ee71a2513804f309d9b92 [formerly 187a3e3c18b3db42d40c896d3a241705f569a6ad]
Former-commit-id: d4df4031445de9ea79634f1a8344e4d5a1253a7e
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io