DOC-2608: Fix error in item description

Author: Farzad Hayatbakhsh

lib/rssfeed.cjs

@@ -50,7 +50,7 @@ module.exports.register = function () {
                         link: `${siteLinkWithVersion}/${linkElement
                             .attr("href")
                             .replace("../", "")}`,
-                        description: `Release notes for TinyMCE ${version}`,
+                        description: `Changelog for TinyMCE ${version}`,
                         guid: version,
                         pubDate: new Date(date).toUTCString(),
                         content,