Clean up docs issues

The Sphinx build produces a number of warnings and errors. Some are
rightfully ignored, but many need to be fixed. These are mostly
unindexed pages and misformatted references.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I9d7a116dc87083ad2dcab20e31cd479364f298cd
diff --git a/howto/release/tasks/index.rst b/howto/release/tasks/index.rst
index 3e305e4..4a62ce5 100644
--- a/howto/release/tasks/index.rst
+++ b/howto/release/tasks/index.rst
@@ -41,3 +41,11 @@
 ----------
 
 - Update version string(s) for voltha-lib-go.
+
+.. toctree::
+   :maxdepth: 1
+
+   charts
+   copyright
+   go_mod_update
+   golang_gofmt_syntax