Merge pull request #145 from bobsaintcool/doc/fix_typo

<documentation/page.md: Fix a typo into page.md doc>

docs/content/documentation/content/page.md

@@ -4,7 +4,7 @@ weight = 30
 +++
 
 A page is any file ending with `.md` in the `content` directory, except files
-named `_index/md`.
+named `_index.md`.
 
 ## Front-matter