Backfil Yoga 2.0 Release notes to blog (#1508)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1508

Backfilling the release notes already on GitHub before the next time we want to do a release, and use the Docusaurus blog.

Reviewed By: yungsters

Differential Revision: D52012362

fbshipit-source-id: 35de017017943ed21263a4a9aeaa0fd1418c2bc7

website-next/docusaurus.config.js

@@ -126,6 +126,7 @@ export default {
       prism: {
         theme: prismThemes.github,
         darkTheme: prismThemes.oneDark,
+        additionalLanguages: ['gradle', 'java', 'json', 'json5', 'ruby'],
       },
       colorMode: {
         defaultMode: 'dark',