Try to bring back contributing page as it disappeared :)

Author: juhoautio

docs/contributing.md

@@ -1,7 +1,3 @@
-<!--
-The content of this file is manually kept in sync with ../CONTRIBUTING.md. There are formatting differences because this file uses Hugo templating.
--->
-
 ---
 title: "Contributing to Poetry"
 draft: false
@@ -13,6 +9,10 @@ menu:
     weight: 100
 ---
 
+<!--
+The content of this file is manually kept in sync with ../CONTRIBUTING.md. There are formatting differences because this file uses Hugo templating.
+-->
+
 # Contributing to Poetry
 
 First off, thanks for taking the time to contribute!