[docs] Migrate 4.0.0 release notes

Author: andrewnicols

cspell.config.js

@@ -50,6 +50,9 @@ const config = {
         'versioned_docs',
         '*.min.*',
         'src/*',
+
+        // Ignore release notes for now.
+        'docs/release-notes.md',
     ],
     ignoreRegExpList: [
         // Both Email and Urls are in the list of Predefined regexps.