Update core chart to xos-core 2.1.21

Change-Id: Ib196d371ba701695970f35d23bdad0003669fa40
diff --git a/xos-core/Chart.yaml b/xos-core/Chart.yaml
index a04b1cb..6571bd5 100644
--- a/xos-core/Chart.yaml
+++ b/xos-core/Chart.yaml
@@ -17,9 +17,9 @@
 description: XOS - An Extensible Cloud Operating System
 icon: https://guide.opencord.org/logos/xos.svg
 
-version: 2.1.19
+version: 2.1.21
 
 # appVersion is of the xos-core and xos-chameleon containers.
 # xos-tosca and xos-api-tester are versioned in values.yaml
-appVersion: 2.1.19
+appVersion: 2.1.21