am 66a27b01: am 214ea8f1: am 3af366dd: am 462cc377: docs: implement sdk announcement in a collapsible box and revise the \'special\' box color and add rounded corners.

Merge commit '66a27b01201027e371b74b0eb18572dfb7303238'

* commit '66a27b01201027e371b74b0eb18572dfb7303238':
  docs: implement sdk announcement in a collapsible box