expose prometheus node port

Change-Id: I05698ee1dc89bca5f5925807a7b66c8ed0a7a375
diff --git a/bess-upf/Chart.yaml b/bess-upf/Chart.yaml
index 2313b27..32f91c5 100644
--- a/bess-upf/Chart.yaml
+++ b/bess-upf/Chart.yaml
@@ -7,4 +7,4 @@
 name: bess-upf
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.1.2
+version: 0.1.3