doc: minor tweaks to documentation guidelines

Change titles and make them consistent with the rest.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

doc/README.rst

@@ -1,7 +1,7 @@
 .. _zephyr_doc:
 
-Zephyr Documentation Generation
-###############################
+Documentation Generation
+########################
 
 These instructions will walk you through generating the Zephyr Project's
 documentation on your local system using the same documentation sources

doc/documentation/doc-guidelines.rst

@@ -1,7 +1,7 @@
 .. _doc_guidelines:
 
-Documentation Guidelines for the Zephyr Project
-###############################################
+Documentation Guidelines
+########################
 
 Zephyr Project content is written using the `reStructuredText`_ markup
 language (.rst file extension) with Sphinx extensions, and processed

doc/documentation/index.rst

@@ -1,4 +1,4 @@
-.. _documentation_guidelines:
+.. documenting_zephyr:
 
 Documentation Guidelines
 ########################

doc/index.rst

@@ -51,7 +51,6 @@ Source code for the Zephyr Project is maintained in the Zephyr Project's
    introduction/introducing_zephyr.rst
    getting_started/getting_started.rst
    contribute/index.rst
-   documentation/index.rst
    application/application.rst
    kernel/kernel.rst
    security/security.rst
@@ -59,6 +58,7 @@ Source code for the Zephyr Project is maintained in the Zephyr Project's
    devices/index.rst
    tools/index.rst
    porting/index.rst
+   documentation/index.rst
    samples/samples.rst
    api/index.rst
    boards/boards.rst