fix: correct prev link in hello-world (#5595)

Author: awxiaoxian2020

content/docs/hello-world.md

@@ -2,7 +2,7 @@
 id: hello-world
 title: Hello World
 permalink: docs/hello-world.html
-prev: cdn-links.html
+prev: release-channels.html
 next: introducing-jsx.html
 ---