Fix list-posts example
Fix list-posts example

Added missing words in text as well as in example

Former-commit-id: fa17992d00c65c4850c96f6c6289e40e0f8f92bf [formerly 5922ddb34cab15ab4e0d17196e885dd7ab2492dd]
Former-commit-id: e7b4b3510b9f597d1630cc2d5091ec77df4c2f89
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io