Fix location of nimble docs

When building the site add Nimble docs under _scratch/network, instead
of _scratch/network/docs, which was causing the edit_on_github macro to
add and extra `docs` entry to the path. Adjust the toc accordingly.
diff --git a/Makefile b/Makefile
index bb9b3be..2610fd3 100644
--- a/Makefile
+++ b/Makefile
@@ -17,11 +17,10 @@
 	mkdir _scratch
 	cp -a docs/* _scratch
 	# Copy in docs/ from each of the mynewt-* projects.
-	# NOTE: paths here nead to match edit_on_github in conf.py
+	# NOTE: paths here need to match edit_on_github in conf.py
 	cp -a ../mynewt-core/docs/os _scratch/os
 	#
-	mkdir _scratch/network
-	cp -a ../mynewt-nimble/docs _scratch/network/
+	cp -a ../mynewt-nimble/docs _scratch/network
 	#
 	cp -a ../mynewt-newt/docs _scratch/newt
 	#
diff --git a/docs/index.rst b/docs/index.rst
index c375070..b252e08 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -13,7 +13,7 @@
    tutorials/tutorials
    external_links
    os/os_user_guide
-   network/docs/index
+   network/index
    newt/index
    newtmgr/index
    mynewt_faq/index