Fix for security updates not sent ok

macOS/host-monitor.sh

@@ -205,7 +205,7 @@ if [ -n "$SecurityPatches" ]; then
     done <<< "$SecurityPatches"
     SecurityPatchStr=", \"security-patches\": [ "${OUTPUT%%,}" ]"
 else
-    SecurityPatchStr=""
+    SecurityPatchStr=", \"security-patches\": [ ]"
 fi
 # Ex: 
 # SecurityPatchStr=', "security-patches": [ { "installed-version": "", "new-version": "", "package": "macOS Catalina Security Update 2021-003-10.15.7", "sources": [ "Apple","Apple" ] } ]'