[DevCenter]Add JS api-version (#29423)

Author: drielenr

specification/devcenter/DevCenter/tspconfig.yaml

@@ -33,6 +33,7 @@ options:
       description: "Azure Developer DevCenter Client"
       version: "1.0.0"
     flavor: azure
+    api-version: "2023-04-01"
   "@azure-tools/typespec-java":
     package-dir: "azure-developer-devcenter"
     namespace: com.azure.developer.devcenter