Update members.md
Update members.md

alphabetising memberships

Former-commit-id: 239f09c885ef994852bc64b4fa86580ea981cbe2 [formerly 3059321fd5630523ed212ffb614f68681e03d6c8]
Former-commit-id: 09e62921bac8c4676359ead3d4805b0693856995
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io