Use the staging release image as default

Also, use the existing image pull secret

Change-Id: Ia92b116c7127a8e6d619cff2418d827d47779521
diff --git a/omec/omec-upf-pfcp-agent/Chart.yaml b/omec/omec-upf-pfcp-agent/Chart.yaml
index 2d1988c..6e9516d 100644
--- a/omec/omec-upf-pfcp-agent/Chart.yaml
+++ b/omec/omec-upf-pfcp-agent/Chart.yaml
@@ -7,4 +7,4 @@
 name: omec-upf-pfcp-agent
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.1.4
+version: 0.1.5