doc: make it clear the Contributing section is for the docs

Changed files
+2 -2
doc
+1 -1
doc/contributing.xml
···
xmlns:xlink="http://www.w3.org/1999/xlink"
xml:id="chap-contributing">
-
<title>Contributing</title>
+
<title>Contributing to this documentation</title>
<para>The DocBook sources of the Nixpkgs manual are in the <filename
xlink:href="https://github.com/NixOS/nixpkgs/tree/master/doc">doc</filename>
+1 -1
doc/manual.xml
···
<xi:include href="language-support.xml" />
<xi:include href="package-notes.xml" />
<xi:include href="coding-conventions.xml" />
-
<xi:include href="contributing.xml" />
<xi:include href="haskell-users-guide.xml" />
+
<xi:include href="contributing.xml" />
</book>