Hot fix - severities in yaml template for reporting

v2/cmd/nuclei/issue-tracker-config.yaml

@@ -1,3 +1,15 @@
+# Severities
+#   1) Info
+#   2) Low
+#   3) Medium
+#   4) High
+#   5) Critical
+# to specify which severities should be reported
+allow-list:
+  severity: [4, 5]
+# to specify which severities should be excluded from reporting
+deny-list:
+  severity: [1, 2, 3]
 #allow-list:
 #  severity: high,critical
 #deny-list: