[VOL-5129] - Create beta-release branch for voltha-protos

VERSION
-------
  o Bump version string post release and attach a -dev suffix.

Change-Id: Ia49b3777a6dbba2e52d73422dcf425a3cfe803f0
diff --git a/howto/release/repositories/index.rst b/howto/release/repositories/index.rst
index e35cd9d..1b9ac3e 100644
--- a/howto/release/repositories/index.rst
+++ b/howto/release/repositories/index.rst
@@ -10,3 +10,4 @@
    ofagent-go/index
    voltha-lib-go/index
    voltha-onos/index
+   voltha-protos/index