manual/getting started: rename and move 'Getting involved' section

The Getting Involved section is actually an overview of the ways to interact
with the Buildroot community, which is useful for developers _and_ users.
Therefore, this patch moves the section from the Developer Guide to the
Getting Started section, and renames it to 'Community Resources'.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/manual/get-involved.txt

@@ -1,7 +1,7 @@
 // -*- mode:doc; -*-
 // vim: set syntax=asciidoc:
 
-== Getting involved
+== Community resources
 
 Like any open source project, Buildroot has different ways to share
 information in its community and outside.

docs/manual/manual.txt

@@ -22,6 +22,8 @@ include::introduction.txt[]
 
 include::starting-up.txt[]
 
+include::get-involved.txt[]
+
 = User guide
 
 include::working-with.txt[]
@@ -40,8 +42,6 @@ include::beyond-buildroot.txt[]
 
 include::developer-guide.txt[]
 
-include::get-involved.txt[]
-
 include::contribute.txt[]
 
 = Appendix