Fixed doc start 3 dashes in berlin-community-pod-1-multi-olt-DT and dt-berlin-pod-gpon-DT yaml files

Change-Id: Id80dca6df2b108fd89bc071ca38b6aadc52311df
diff --git a/deployment-configs/berlin-community-pod-1-multi-olt-DT.yaml b/deployment-configs/berlin-community-pod-1-multi-olt-DT.yaml
index c23b2ed..6178349 100644
--- a/deployment-configs/berlin-community-pod-1-multi-olt-DT.yaml
+++ b/deployment-configs/berlin-community-pod-1-multi-olt-DT.yaml
@@ -1,4 +1,4 @@
-  ---
+---
 
   # Copyright 2020-present Open Networking Foundation
   #