Remove "this section is new" admonitions to be in line with newer sections #37

Job	Run time
downloadSubmodules (mkdocs-material-insiders) / download	18s
downloadSubmodules (i18n) / download	9s
downloadSubmodules (brand) / download	11s
build (en, false) / build	1m 13s
build (es, true) / build	56s
build (fr, true) / build	59s
build (he, true) / build	1m 1s
build (nl, true) / build	1m 25s
build (ru, true) / build	1m 1s
build (it, true) / build	59s
build (zh-Hant, true) / build	1m 19s
deploy / netlify	1m 54s
comment	3s
cleanup / brand	4s
cleanup / i18n	9s
cleanup / mkdocs-material-insiders	3s
	11m 44s

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