chore(v2): update examples to use alpha73 (#4631)

* regenerate examples on alpha73

* fix init template typo + add missing files

examples/classic/docs/tutorial-basics/create-a-blog-post.md

@@ -0,0 +1,29 @@
+---
+sidebar_position: 3
+---
+
+# Create a Blog Post
+
+Docusaurus creates a **page for each blog post**, but also a **blog index page**, a **tag system**, an **RSS** feed...
+
+## Create your first Post
+
+Create a file at `blog/2021-02-28-greetings.md`:
+
+```md title="blog/2021-02-28-greetings.md"
+---
+slug: greetings
+title: Greetings!
+author: Steven Hansel
+author_title: Docusaurus Contributor
+author_url: https://github.com/ShinteiMai
+author_image_url: https://github.com/ShinteiMai.png
+tags: [greetings]
+---
+
+Congratulations, you have made your first post!
+
+Feel free to play around and edit this post as much you like.
+```
+
+A new blog post is now available at `http://localhost:3000/blog/greetings`.