chore(v2): upgrade examples to beta.2 (#5057)

examples/bootstrap/blog/2019-05-29-hello-world.md

@@ -8,7 +8,7 @@ author_image_url: https://avatars1.githubusercontent.com/u/17883920?s=460&v=4
 tags: [hello, docusaurus]
 ---
 
-Welcome to this blog. This blog is created with [**Docusaurus 2 alpha**](https://docusaurus.io/).
+Welcome to this blog. This blog is created with [**Docusaurus 2**](https://docusaurus.io/).
 
 <!--truncate-->
 

examples/bootstrap/package.json

@@ -15,8 +15,8 @@
     "dev": "docusaurus start"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-beta.0",
-    "@docusaurus/preset-bootstrap": "2.0.0-beta.0",
+    "@docusaurus/core": "2.0.0-beta.2",
+    "@docusaurus/preset-bootstrap": "2.0.0-beta.2",
     "@mdx-js/react": "^1.6.21",
     "@svgr/webpack": "^5.5.0",
     "clsx": "^1.1.1",