chore: regenerate beta.6 examples + fix regen script (#5484)

* update examples script

* rename ext

* typo

* update examples

* fix script to update starters

* update examples

* add --allow-empty so that script does not fail if nothing changed

* fix lint

examples/classic/docs/intro.md

@@ -10,7 +10,7 @@ Let's discover **Docusaurus in less than 5 minutes**.
 
 Get started by **creating a new site**.
 
-Or **try Docusaurus immediately** with **[new.docusaurus.io](https://new.docusaurus.io)**.
+Or **try Docusaurus immediately** with **[docusaurus.new](https://docusaurus.new)**.
 
 ## Generate a new site
 

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

@@ -14,10 +14,15 @@ Create a file at `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
+authors:
+  - name: Joel Marcey
+    title: Co-creator of Docusaurus 1
+    url: https://github.com/JoelMarcey
+    image_url: https://github.com/JoelMarcey.png
+  - name: Sébastien Lorber
+    title: Docusaurus maintainer
+    url: https://sebastienlorber.com
+    image_url: https://github.com/slorber.png
 tags: [greetings]
 ---