Update ProvisionerSettings.tsx (#3845)

dashboard/src/components/ProvisionerSettings.tsx

@@ -80,6 +80,10 @@ const machineTypeOptions = [
   { value: "c6i.2xlarge", label: "c6i.2xlarge" },
   { value: "c6i.4xlarge", label: "c6i.4xlarge" },
   { value: "c6i.8xlarge", label: "c6i.8xlarge" },
+  { value: "c6a.large", label: "c6a.large" },
+  { value: "c6a.2xlarge", label: "c6a.2xlarge" },
+  { value: "c6a.4xlarge", label: "c6a.4xlarge" },
+  { value: "c6a.8xlarge", label: "c6a.8xlarge" },
   { value: "r6i.large", label: "r6i.large" },
   { value: "r6i.xlarge", label: "r6i.xlarge" },
   { value: "r6i.2xlarge", label: "r6i.2xlarge" },