Update az types (#17717)

Update Azure.Bicep.Types.Az to
[0.2.789](https://www.nuget.org/packages/Azure.Bicep.Types.Az/0.2.789).

Author: shenglol

src/Bicep.Cli.IntegrationTests/packages.lock.json

@@ -23,7 +23,7 @@ param boolParam1 bool
 extension az
 //@    "az": {
 //@      "name": "AzureResourceManager",
-//@      "version": "0.2.784"
+//@      "version": "0.2.789"
 //@    },
 extension kubernetes as k8s
 //@    "k8s": {

src/Bicep.Cli.UnitTests/packages.lock.json

@@ -10,7 +10,7 @@
     "_generator": {
       "name": "bicep",
       "version": "dev",
-      "templateHash": "6407882912896869902"
+      "templateHash": "633794422626772510"
     }
   },
   "parameters": {
@@ -27,7 +27,7 @@
   "extensions": {
     "az": {
       "name": "AzureResourceManager",
-      "version": "0.2.784"
+      "version": "0.2.789"
     },
     "k8s": {
       "name": "Kubernetes",