[DOC] Update release version for RTDs in Kohn

Modify the versions in conf.* files to create Kohn RTDs

Issue-ID: OOM-3040

Signed-off-by: Andreas Geissler <andreas-geissler@telekom.de>
Change-Id: I43334f1f642aa61ca7b0c6becbd8efcfece56dce
diff --git a/docs/conf.yaml b/docs/conf.yaml
index ab59281..11eaff6 100644
--- a/docs/conf.yaml
+++ b/docs/conf.yaml
@@ -3,5 +3,5 @@
 project: onap
 
 # Change this to ReleaseBranchName to modify the header
-default-version: latest
+default-version: kohn
 #