doc: rearrange top level index pages

Re-arrange top level index pages based on proposal.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/doc/index-tex.rst b/doc/index-tex.rst
index 6698827..d7282cb 100644
--- a/doc/index-tex.rst
+++ b/doc/index-tex.rst
@@ -15,12 +15,12 @@
 
    introduction/index.rst
    develop/index.rst
-   build/index.rst
    kernel/index.rst
-   connectivity/index.rst
    services/index.rst
+   build/index.rst
+   connectivity/index.rst
    reference/index.rst
    hardware/index.rst
-   security/index.rst
    contribute/index.rst
    project/index.rst
+   security/index.rst
diff --git a/doc/index.rst b/doc/index.rst
index f6d6e63..74e99d5 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -103,15 +103,15 @@
 
    introduction/index.rst
    develop/index.rst
-   build/index.rst
    kernel/index.rst
-   connectivity/index.rst
    services/index.rst
+   build/index.rst
+   connectivity/index.rst
    reference/index.rst
    hardware/index.rst
-   security/index.rst
    contribute/index.rst
    project/index.rst
+   security/index.rst
    samples/index.rst
    boards/index.rst
    releases/index.rst