Upgrading GO version to 1.16 in Alarm go

Signed-off-by: manoj1 <manoj.1.manoj@nokia.com>
Change-Id: I4974be493d8e245b963120c9411126867d4506ab
diff --git a/go.mod b/go.mod
index 25a53a3..fd652c8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module gerrit.o-ran-sc.org/r/ric-plt/alarm-go
 
-go 1.13
+go 1.16
 
 replace gerrit.o-ran-sc.org/r/ric-plt/alarm-go/alarm => ./alarm/