Remove duplicates and add GitHub action to lint collection-index.yml · devcontainers/devcontainers.github.io@44139d2

1037:81 [line-length] line too long (81 > 80 characters)

998:81 [line-length] line too long (84 > 80 characters)

995:81 [line-length] line too long (90 > 80 characters)

987:81 [line-length] line too long (83 > 80 characters)

924:81 [line-length] line too long (87 > 80 characters)

923:81 [line-length] line too long (91 > 80 characters)

299:81 [line-length] line too long (83 > 80 characters)

298:81 [line-length] line too long (87 > 80 characters)

268:81 [line-length] line too long (84 > 80 characters)

154:81 [line-length] line too long (81 > 80 characters)

1:1 [document-start] missing document start "---"

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