feat(zigchaintestnet): update versions to 1.2.2 (cosmos#6599)

Author: AndWa

testnets/zigchaintestnet/versions.json

@@ -88,6 +88,23 @@
         "version": "0.55.1",
         "enabled": true
       }
+    },
+    {
+      "name": "1.2.2",
+      "recommended_version": "1.2.2",
+      "compatible_versions": [],
+      "consensus": {
+        "type": "cometbft",
+        "version": "0.38.17"
+      },
+      "sdk": {
+        "type": "cosmos",
+        "version": "0.50.14"
+      },
+      "cosmwasm": {
+        "version": "0.55.1",
+        "enabled": true
+      }
     }
   ]
 }