Changing default file format for the snippets from TOML to YAML

docs/content/contributing/data-collection.md

docs/content/getting-started/configuration-overview.md

docs/content/getting-started/faq.md

docs/content/getting-started/install-traefik.md

docs/content/https/acme.md

docs/content/https/include-acme-multiple-domains-example.md

.../https/include-acme-multiple-domains-from-rule-example.md

docs/content/https/include-acme-single-domain-example.md

docs/content/https/tls.md

docs/content/middlewares/addprefix.md

docs/content/middlewares/basicauth.md

docs/content/middlewares/buffering.md

docs/content/middlewares/chain.md

docs/content/middlewares/circuitbreaker.md

docs/content/middlewares/compress.md

docs/content/middlewares/contenttype.md

docs/content/middlewares/digestauth.md

docs/content/middlewares/errorpages.md

docs/content/middlewares/forwardauth.md

docs/content/middlewares/headers.md