Update manifest for Synthetic

manifests/Synthetic.json

@@ -2,7 +2,7 @@
   "slug": "Synthetic",
   "name": "Synthetic",
   "brand": "SV Modular",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "license": "Proprietary",
   "author": "SV Modular",
   "authorEmail": "svmodular@legitimatesounding.com",
@@ -43,6 +43,14 @@
       "tags": [
         "Synth voice"
       ]
+    },
+    {
+      "slug": "RubberDucky",
+      "name": "Rubber Ducky",
+      "description": "Rubber Ducky Polyphonic Synth",
+      "tags": [
+        "Synth voice"
+      ]
     }
   ]
 }