Updated installation files

system/extensions/update-available.ini

@@ -58,9 +58,9 @@ system/workers/blog.php: blog.php, create, update
 system/layouts/blog.html: blog.html, create, update, careful
 system/layouts/blog-start.html: blog-start.html, create, update, careful
 content/shared/page-new-blog.md: page-new-blog.md, create, optional
-content/2-blog/page.md: page.md, create, optional
-content/2-blog/2020-04-07-blog-example-page.md: 2020-04-07-blog-example-page.md, create, optional
-content/2-blog/2020-12-06-made-for-people.md: 2020-12-06-made-for-people.md, create, optional
+content/3-blog/page.md: page.md, create, optional
+content/3-blog/2020-04-07-blog-example-page.md: 2020-04-07-blog-example-page.md, create, optional
+content/3-blog/2020-12-06-made-for-people.md: 2020-12-06-made-for-people.md, create, optional
 
 Extension: Breadcrumb
 Version: 0.9.1